diff --git a/src/addons/mod/assign/services/handlers/prefetch.ts b/src/addons/mod/assign/services/handlers/prefetch.ts
index 2c909584e..8d84587d0 100644
--- a/src/addons/mod/assign/services/handlers/prefetch.ts
+++ b/src/addons/mod/assign/services/handlers/prefetch.ts
@@ -35,6 +35,7 @@ import { CoreGroups } from '@services/groups';
 import { AddonModAssignSync, AddonModAssignSyncResult } from '../assign-sync';
 import { CoreUser } from '@features/user/services/user';
 import { CoreGradesHelper } from '@features/grades/services/grades-helper';
+import { CoreCourses } from '@features/courses/services/courses';
 
 /**
  * Handler to prefetch assigns.
@@ -252,6 +253,8 @@ export class AddonModAssignPrefetchHandlerService extends CoreCourseActivityPref
         promises.push(this.prefetchSubmissions(assign, courseId, module.id, userId, siteId));
 
         promises.push(CoreCourseHelper.getModuleCourseIdByInstance(assign.id, 'assign', siteId));
+        // Get course data, needed to determine upload max size if it's configured to be course limit.
+        promises.push(CoreUtils.ignoreErrors(CoreCourses.getCourseByField('id', courseId, siteId)));
 
         // Download intro files and attachments. Do not call getFiles because it'd call some WS twice.
         let files: CoreWSFile[] = assign.introattachments || [];
diff --git a/src/addons/mod/assign/submission/file/component/addon-mod-assign-submission-file.html b/src/addons/mod/assign/submission/file/component/addon-mod-assign-submission-file.html
index 92517dd92..af3d5235f 100644
--- a/src/addons/mod/assign/submission/file/component/addon-mod-assign-submission-file.html
+++ b/src/addons/mod/assign/submission/file/component/addon-mod-assign-submission-file.html
@@ -13,7 +13,7 @@
     <ion-item-divider class="ion-text-wrap" sticky="true">
         <ion-label><h2>{{ plugin.name }}</h2></ion-label>
     </ion-item-divider>
-    <core-attachments [files]="files" [maxSize]="maxSize" [maxSubmissions]="maxSubmissions"
+    <core-attachments [files]="files" [maxSize]="maxSize" [maxSubmissions]="maxSubmissions" [courseId]="assign.course"
         [component]="component" [componentId]="assign.cmid" [acceptedTypes]="acceptedTypes" [allowOffline]="allowOffline">
     </core-attachments>
 </div>
diff --git a/src/addons/mod/data/fields/file/component/addon-mod-data-field-file.html b/src/addons/mod/data/fields/file/component/addon-mod-data-field-file.html
index 4afdd5eb6..286e96940 100644
--- a/src/addons/mod/data/fields/file/component/addon-mod-data-field-file.html
+++ b/src/addons/mod/data/fields/file/component/addon-mod-data-field-file.html
@@ -1,7 +1,7 @@
 <span *ngIf="editMode && form">
     <span [core-mark-required]="field.required" class="core-mark-required"></span>
     <core-attachments [files]="files" [maxSize]="maxSizeBytes" maxSubmissions="1" [component]="component"
-        [componentId]="componentId" [allowOffline]="true">
+        [componentId]="componentId" [allowOffline]="true" [courseId]="database?.course">
     </core-attachments>
     <core-input-errors *ngIf="error" [errorText]="error"></core-input-errors>
 </span>
diff --git a/src/addons/mod/data/fields/picture/component/addon-mod-data-field-picture.html b/src/addons/mod/data/fields/picture/component/addon-mod-data-field-picture.html
index d00754fdc..bf10ea74e 100644
--- a/src/addons/mod/data/fields/picture/component/addon-mod-data-field-picture.html
+++ b/src/addons/mod/data/fields/picture/component/addon-mod-data-field-picture.html
@@ -1,7 +1,7 @@
 <span *ngIf="editMode && form" [formGroup]="form">
     <span [core-mark-required]="field.required" class="core-mark-required"></span>
     <core-attachments [files]="files" [maxSize]="maxSizeBytes" maxSubmissions="1" [component]="component"
-        [componentId]="componentId" [allowOffline]="true" acceptedTypes="image">
+        [componentId]="componentId" [allowOffline]="true" acceptedTypes="image" [courseId]="database?.course">
     </core-attachments>
     <core-input-errors *ngIf="error" [errorText]="error"></core-input-errors>
 
diff --git a/src/addons/mod/data/services/handlers/prefetch.ts b/src/addons/mod/data/services/handlers/prefetch.ts
index 92844d596..01446305c 100644
--- a/src/addons/mod/data/services/handlers/prefetch.ts
+++ b/src/addons/mod/data/services/handlers/prefetch.ts
@@ -16,6 +16,7 @@ import { Injectable } from '@angular/core';
 import { CoreComments } from '@features/comments/services/comments';
 import { CoreCourseActivityPrefetchHandlerBase } from '@features/course/classes/activity-prefetch-handler';
 import { CoreCourseCommonModWSOptions, CoreCourse, CoreCourseAnyModuleData } from '@features/course/services/course';
+import { CoreCourses } from '@features/courses/services/courses';
 import { CoreFilepool } from '@services/filepool';
 import { CoreGroup, CoreGroups } from '@services/groups';
 import { CoreSitesCommonWSOptions, CoreSites, CoreSitesReadingStrategy } from '@services/sites';
@@ -269,6 +270,9 @@ export class AddonModDataPrefetchHandlerService extends CoreCourseActivityPrefet
         // Add Basic Info to manage links.
         promises.push(CoreCourse.getModuleBasicInfoByInstance(database.id, 'data', siteId));
 
+        // Get course data, needed to determine upload max size if it's configured to be course limit.
+        promises.push(CoreUtils.ignoreErrors(CoreCourses.getCourseByField('id', courseId, siteId)));
+
         await Promise.all(promises);
     }
 
diff --git a/src/addons/mod/forum/components/edit-post/edit-post.html b/src/addons/mod/forum/components/edit-post/edit-post.html
index 60a500105..19f1c65ba 100644
--- a/src/addons/mod/forum/components/edit-post/edit-post.html
+++ b/src/addons/mod/forum/components/edit-post/edit-post.html
@@ -41,7 +41,7 @@
         <div *ngIf="advanced" id="addon-mod-forum-advanced">
             <core-attachments *ngIf="forum.id && forum.maxattachments > 0"
                 [maxSize]="forum.maxbytes" [maxSubmissions]="forum.maxattachments" [allowOffline]="true" [files]="replyData.files"
-                [component]="component" [componentId]="forum.cmid">
+                [component]="component" [componentId]="forum.cmid" [courseId]="forum.course">
             </core-attachments>
         </div>
         <ion-grid>
diff --git a/src/addons/mod/forum/components/post/post.html b/src/addons/mod/forum/components/post/post.html
index a3b998b29..89dbb0ed0 100644
--- a/src/addons/mod/forum/components/post/post.html
+++ b/src/addons/mod/forum/components/post/post.html
@@ -139,7 +139,7 @@
             <div *ngIf="advanced" [id]="'addon-forum-reply-edit-form-advanced-' + uniqueId">
                 <core-attachments
                     [files]="replyData.files" [maxSize]="forum.maxbytes" [maxSubmissions]="forum.maxattachments"
-                    [component]="component" [componentId]="forum.cmid" [allowOffline]="true">
+                    [component]="component" [componentId]="forum.cmid" [allowOffline]="true" [courseId]="courseId">
                 </core-attachments>
             </div>
         </ng-container>
diff --git a/src/addons/mod/forum/pages/new-discussion/new-discussion.html b/src/addons/mod/forum/pages/new-discussion/new-discussion.html
index c37f3edef..6155f595b 100644
--- a/src/addons/mod/forum/pages/new-discussion/new-discussion.html
+++ b/src/addons/mod/forum/pages/new-discussion/new-discussion.html
@@ -68,7 +68,7 @@
                 </ion-item>
                 <core-attachments *ngIf="canCreateAttachments && forum && forum.maxattachments > 0"
                     [files]="newDiscussion.files" [maxSize]="forum.maxbytes" [maxSubmissions]="forum.maxattachments"
-                    [component]="component" [componentId]="forum.cmid" [allowOffline]="true">
+                    [component]="component" [componentId]="forum.cmid" [allowOffline]="true" [courseId]="courseId">
                 </core-attachments>
             </div>
             <ion-item>
diff --git a/src/addons/mod/forum/pages/new-discussion/new-discussion.page.ts b/src/addons/mod/forum/pages/new-discussion/new-discussion.page.ts
index f47f8a5b4..71e71d97e 100644
--- a/src/addons/mod/forum/pages/new-discussion/new-discussion.page.ts
+++ b/src/addons/mod/forum/pages/new-discussion/new-discussion.page.ts
@@ -86,8 +86,8 @@ export class AddonModForumNewDiscussionPage implements OnInit, OnDestroy, CanLea
 
     advanced = false; // Display all form fields.
     accessInfo: AddonModForumAccessInformation = {};
+    courseId!: number;
 
-    protected courseId!: number;
     protected cmId!: number;
     protected forumId!: number;
     protected timeCreated!: number;
diff --git a/src/addons/mod/forum/services/handlers/prefetch.ts b/src/addons/mod/forum/services/handlers/prefetch.ts
index 7b7f62dbb..41357fcf6 100644
--- a/src/addons/mod/forum/services/handlers/prefetch.ts
+++ b/src/addons/mod/forum/services/handlers/prefetch.ts
@@ -24,6 +24,7 @@ import { CoreGroups, CoreGroupsProvider } from '@services/groups';
 import { CoreUtils } from '@services/utils/utils';
 import { AddonModForumSync } from '../forum-sync';
 import { makeSingleton } from '@singletons';
+import { CoreCourses } from '@features/courses/services/courses';
 
 /**
  * Handler to prefetch forums.
@@ -229,6 +230,9 @@ export class AddonModForumPrefetchHandlerService extends CoreCourseActivityPrefe
             promises.push(CoreUser.getUserPreference(AddonModForumProvider.PREFERENCE_SORTORDER, siteId));
         }
 
+        // Get course data, needed to determine upload max size if it's configured to be course limit.
+        promises.push(CoreUtils.ignoreErrors(CoreCourses.getCourseByField('id', courseId, siteId)));
+
         await Promise.all(promises);
     }
 
diff --git a/src/addons/mod/glossary/pages/edit/edit.html b/src/addons/mod/glossary/pages/edit/edit.html
index 1c7d899ff..9ab191489 100644
--- a/src/addons/mod/glossary/pages/edit/edit.html
+++ b/src/addons/mod/glossary/pages/edit/edit.html
@@ -50,7 +50,7 @@
                 <ion-label><h2>{{ 'addon.mod_glossary.attachment' | translate }}</h2></ion-label>
             </ion-item-divider>
             <core-attachments [files]="attachments" [component]="component" [componentId]="glossary.coursemodule"
-                [allowOffline]="true">
+                [allowOffline]="true" [courseId]="courseId">
             </core-attachments>
             <ng-container *ngIf="glossary.usedynalink">
                 <ion-item-divider>
diff --git a/src/addons/mod/glossary/services/handlers/prefetch.ts b/src/addons/mod/glossary/services/handlers/prefetch.ts
index 3c29641d3..16236256d 100644
--- a/src/addons/mod/glossary/services/handlers/prefetch.ts
+++ b/src/addons/mod/glossary/services/handlers/prefetch.ts
@@ -16,9 +16,11 @@ import { Injectable } from '@angular/core';
 import { CoreComments } from '@features/comments/services/comments';
 import { CoreCourseActivityPrefetchHandlerBase } from '@features/course/classes/activity-prefetch-handler';
 import { CoreCourse, CoreCourseAnyModuleData } from '@features/course/services/course';
+import { CoreCourses } from '@features/courses/services/courses';
 import { CoreUser } from '@features/user/services/user';
 import { CoreFilepool } from '@services/filepool';
 import { CoreSites, CoreSitesReadingStrategy } from '@services/sites';
+import { CoreUtils } from '@services/utils/utils';
 import { CoreWSFile } from '@services/ws';
 import { makeSingleton } from '@singletons';
 import { AddonModGlossary, AddonModGlossaryEntry, AddonModGlossaryGlossary, AddonModGlossaryProvider } from '../glossary';
@@ -210,6 +212,9 @@ export class AddonModGlossaryPrefetchHandlerService extends CoreCourseActivityPr
         promises.push(CoreCourse.getModuleBasicInfo(module.id, siteId));
         promises.push(CoreCourse.getModuleBasicInfoByInstance(glossary.id, 'glossary', siteId));
 
+        // Get course data, needed to determine upload max size if it's configured to be course limit.
+        promises.push(CoreUtils.ignoreErrors(CoreCourses.getCourseByField('id', courseId, siteId)));
+
         await Promise.all(promises);
     }
 
diff --git a/src/addons/mod/quiz/services/handlers/prefetch.ts b/src/addons/mod/quiz/services/handlers/prefetch.ts
index 982b5920e..1ee999c75 100644
--- a/src/addons/mod/quiz/services/handlers/prefetch.ts
+++ b/src/addons/mod/quiz/services/handlers/prefetch.ts
@@ -18,6 +18,7 @@ import { Injectable } from '@angular/core';
 import { CoreError } from '@classes/errors/error';
 import { CoreCourseActivityPrefetchHandlerBase } from '@features/course/classes/activity-prefetch-handler';
 import { CoreCourseAnyModuleData, CoreCourseCommonModWSOptions } from '@features/course/services/course';
+import { CoreCourses } from '@features/courses/services/courses';
 import { CoreQuestionHelper } from '@features/question/services/question-helper';
 import { CoreFilepool } from '@services/filepool';
 import { CoreSites, CoreSitesReadingStrategy } from '@services/sites';
@@ -374,6 +375,9 @@ export class AddonModQuizPrefetchHandlerService extends CoreCourseActivityPrefet
         promises.push(this.prefetchGradeAndFeedback(quiz, modOptions, siteId));
         promises.push(AddonModQuiz.getAttemptAccessInformation(quiz.id, 0, modOptions)); // Last attempt.
 
+        // Get course data, needed to determine upload max size if it's configured to be course limit.
+        promises.push(CoreUtils.ignoreErrors(CoreCourses.getCourseByField('id', courseId, siteId)));
+
         await Promise.all(promises);
 
         // We have quiz data, now we'll get specific data for each attempt.
diff --git a/src/addons/mod/workshop/components/assessment-strategy/addon-mod-workshop-assessment-strategy.html b/src/addons/mod/workshop/components/assessment-strategy/addon-mod-workshop-assessment-strategy.html
index df65c40e7..42baab58b 100644
--- a/src/addons/mod/workshop/components/assessment-strategy/addon-mod-workshop-assessment-strategy.html
+++ b/src/addons/mod/workshop/components/assessment-strategy/addon-mod-workshop-assessment-strategy.html
@@ -37,7 +37,7 @@
             </ion-item>
             <core-attachments *ngIf="edit && workshop.overallfeedbackfiles" [files]="data.assessment?.feedbackattachmentfiles"
                 [maxSize]="workshop.overallfeedbackmaxbytes" [maxSubmissions]="workshop.overallfeedbackfiles"
-                [component]="component" [componentId]="componentId" [allowOffline]="true">
+                [component]="component" [componentId]="componentId" [allowOffline]="true" [courseId]="workshop.course">
             </core-attachments>
             <ion-item *ngIf="edit && access && access.canallocate">
                 <ion-label position="stacked">
diff --git a/src/addons/mod/workshop/pages/edit-submission/edit-submission.html b/src/addons/mod/workshop/pages/edit-submission/edit-submission.html
index e39705bf9..ad52ca562 100644
--- a/src/addons/mod/workshop/pages/edit-submission/edit-submission.html
+++ b/src/addons/mod/workshop/pages/edit-submission/edit-submission.html
@@ -39,7 +39,8 @@
 
             <core-attachments *ngIf="fileAvailable" [files]="attachments" [maxSize]="workshop.maxbytes"
                 [maxSubmissions]="workshop.nattachments" [component]="component" [componentId]="workshop.coursemodule"
-                allowOffline="true" [acceptedTypes]="workshop.submissionfiletypes" [required]="fileRequired">
+                allowOffline="true" [acceptedTypes]="workshop.submissionfiletypes" [required]="fileRequired"
+                [courseId]="workshop.course">
             </core-attachments>
         </form>
     </core-loading>
diff --git a/src/addons/mod/workshop/services/handlers/prefetch.ts b/src/addons/mod/workshop/services/handlers/prefetch.ts
index 088002c86..c0903280a 100644
--- a/src/addons/mod/workshop/services/handlers/prefetch.ts
+++ b/src/addons/mod/workshop/services/handlers/prefetch.ts
@@ -16,6 +16,7 @@ import { AddonModDataSyncResult } from '@addons/mod/data/services/data-sync';
 import { Injectable } from '@angular/core';
 import { CoreCourseActivityPrefetchHandlerBase } from '@features/course/classes/activity-prefetch-handler';
 import { CoreCourse, CoreCourseAnyModuleData } from '@features/course/services/course';
+import { CoreCourses } from '@features/courses/services/courses';
 import { CoreUser } from '@features/user/services/user';
 import { CoreFilepool } from '@services/filepool';
 import { CoreGroup, CoreGroups } from '@services/groups';
@@ -372,6 +373,9 @@ export class AddonModWorkshopPrefetchHandlerService extends CoreCourseActivityPr
         promises.push(CoreCourse.getModuleBasicInfoByInstance(workshop.id, 'workshop', siteId));
         promises.push(CoreCourse.getModuleBasicGradeInfo(module.id, siteId));
 
+        // Get course data, needed to determine upload max size if it's configured to be course limit.
+        promises.push(CoreUtils.ignoreErrors(CoreCourses.getCourseByField('id', courseId, siteId)));
+
         await Promise.all(promises);
 
         // Prefetch user profiles.
diff --git a/src/addons/qtype/essay/component/addon-qtype-essay.html b/src/addons/qtype/essay/component/addon-qtype-essay.html
index 40e4359b7..a70656f8a 100644
--- a/src/addons/qtype/essay/component/addon-qtype-essay.html
+++ b/src/addons/qtype/essay/component/addon-qtype-essay.html
@@ -52,7 +52,7 @@
             <core-attachments *ngIf="uploadFilesSupported && essayQuestion.attachmentsDraftIdInput" [files]="attachments"
                 [component]="component" [componentId]="componentId" [maxSize]="essayQuestion.attachmentsMaxBytes"
                 [maxSubmissions]="essayQuestion.attachmentsMaxFiles" [allowOffline]="offlineEnabled"
-                [acceptedTypes]="essayQuestion.attachmentsAcceptedTypes">
+                [acceptedTypes]="essayQuestion.attachmentsAcceptedTypes" [courseId]="courseId">
             </core-attachments>
 
             <input *ngIf="essayQuestion.attachmentsDraftIdInput" type="hidden" [name]="essayQuestion.attachmentsDraftIdInput.name"
diff --git a/src/core/components/attachments/attachments.ts b/src/core/components/attachments/attachments.ts
index b541e1947..925d71de7 100644
--- a/src/core/components/attachments/attachments.ts
+++ b/src/core/components/attachments/attachments.ts
@@ -23,6 +23,8 @@ import { CoreApp } from '@services/app';
 import { CoreDomUtils } from '@services/utils/dom';
 import { CoreFileUploaderHelper } from '@features/fileuploader/services/fileuploader-helper';
 import { CoreFileEntry } from '@services/file-helper';
+import { CoreCourses } from '@features/courses/services/courses';
+import { CoreUtils } from '@services/utils/utils';
 
 /**
  * Component to render attachments, allow adding more and delete the current ones.
@@ -44,13 +46,14 @@ import { CoreFileEntry } from '@services/file-helper';
 export class CoreAttachmentsComponent implements OnInit {
 
     @Input() files?: CoreFileEntry[]; // List of attachments. New attachments will be added to this array.
-    @Input() maxSize?: number; // Max size for attachments. -1 means unlimited, 0 means user max size, not defined means unknown.
+    @Input() maxSize?: number; // Max size. -1 means unlimited, 0 means course/user max size, not defined means unknown.
     @Input() maxSubmissions?: number; // Max number of attachments. -1 means unlimited, not defined means unknown limit.
     @Input() component?: string; // Component the downloaded files will be linked to.
     @Input() componentId?: string | number; // Component ID.
     @Input() allowOffline?: boolean | string; // Whether to allow selecting files in offline.
     @Input() acceptedTypes?: string; // List of supported filetypes. If undefined, all types supported.
     @Input() required?: boolean; // Whether to display the required mark.
+    @Input() courseId?: number; // Course ID.
 
     maxSizeReadable?: string;
     maxSubmissionsReadable?: string;
@@ -65,15 +68,7 @@ export class CoreAttachmentsComponent implements OnInit {
         this.maxSize = this.maxSize !== null ? Number(this.maxSize) : NaN;
 
         if (this.maxSize === 0) {
-            const currentSite = CoreSites.getCurrentSite();
-            const siteInfo = currentSite?.getInfo();
-
-            if (siteInfo?.usermaxuploadfilesize) {
-                this.maxSize = siteInfo.usermaxuploadfilesize;
-                this.maxSizeReadable = CoreTextUtils.bytesToSize(this.maxSize, 2);
-            } else {
-                this.maxSizeReadable = Translate.instant('core.unknown');
-            }
+            this.getMaxSizeOfArea();
         } else if (this.maxSize > 0) {
             this.maxSizeReadable = CoreTextUtils.bytesToSize(this.maxSize, 2);
         } else if (this.maxSize === -1) {
@@ -97,6 +92,36 @@ export class CoreAttachmentsComponent implements OnInit {
         }
     }
 
+    /**
+     * Get max size of the area.
+     *
+     * @return Promise resolved when done.
+     */
+    protected async getMaxSizeOfArea(): Promise<void> {
+        if (this.courseId) {
+            // Check course max size.
+            const course = await CoreUtils.ignoreErrors(CoreCourses.getCourseByField('id', this.courseId));
+
+            if (course?.maxbytes) {
+                this.maxSize = course.maxbytes;
+                this.maxSizeReadable = CoreTextUtils.bytesToSize(this.maxSize, 2);
+
+                return;
+            }
+        }
+
+        // Check user max size.
+        const currentSite = CoreSites.getCurrentSite();
+        const siteInfo = currentSite?.getInfo();
+
+        if (siteInfo?.usermaxuploadfilesize) {
+            this.maxSize = siteInfo.usermaxuploadfilesize;
+            this.maxSizeReadable = CoreTextUtils.bytesToSize(this.maxSize, 2);
+        } else {
+            this.maxSizeReadable = Translate.instant('core.unknown');
+        }
+    }
+
     /**
      * Add a new attachment.
      */