diff --git a/assets/vue/components/basecomponents/BaseChart.vue b/assets/vue/components/basecomponents/BaseChart.vue
index 4a2d46d4d0f..84f5c65c88a 100644
--- a/assets/vue/components/basecomponents/BaseChart.vue
+++ b/assets/vue/components/basecomponents/BaseChart.vue
@@ -2,7 +2,7 @@
   <PrimeChart
     :data="data"
     :options="{}"
-    class="w-full md:w-30rem"
+    class="w-full md:w-30rem flex justify-center"
     type="pie"
   />
 </template>
diff --git a/assets/vue/views/documents/DocumentsList.vue b/assets/vue/views/documents/DocumentsList.vue
index 639998f60e7..1a052f471da 100644
--- a/assets/vue/views/documents/DocumentsList.vue
+++ b/assets/vue/views/documents/DocumentsList.vue
@@ -392,7 +392,6 @@
     :style="{ width: '28rem' }"
     :title="t('Space available')"
   >
-    <p>This feature is in development, this is a mockup with placeholder data!</p>
     <BaseChart :data="usageData" />
   </BaseDialog>
 
@@ -947,10 +946,32 @@ function showSlideShowWithFirstImage() {
   document.querySelector('button.fancybox-button--play')?.click()
 }
 
-function showUsageDialog() {
-  usageData.value = {
-    datasets: [{ data: [83, 14, 5] }],
-    labels: ["Course", "Teacher", "Available space"],
+async function showUsageDialog() {
+  try {
+    const response = await axios.get(`/api/documents/${cid}/usage`, {
+      headers: {
+        'Accept': 'application/json',
+        'Content-Type': 'application/json'
+      }
+    })
+
+    usageData.value = response.data
+  } catch (error) {
+    console.error("Error fetching storage usage:", error)
+
+    usageData.value = {
+      datasets: [{
+        data: [100],
+        backgroundColor: ['#CCCCCC', '#CCCCCC', '#CCCCCC'],
+        borderWidth: 2,
+        borderColor: '#E0E0E0'
+      }],
+      labels: [
+        t('Course storage (unavailable)'), 
+        t('Teacher storage (unavailable)'), 
+        t('Total storage (unavailable)')
+      ],
+    }
   }
   isFileUsageDialogVisible.value = true
 }
diff --git a/src/CoreBundle/Controller/Api/DocumentUsageAction.php b/src/CoreBundle/Controller/Api/DocumentUsageAction.php
new file mode 100644
index 00000000000..81e2ed98101
--- /dev/null
+++ b/src/CoreBundle/Controller/Api/DocumentUsageAction.php
@@ -0,0 +1,173 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Chamilo\CoreBundle\Controller\Api;
+
+use Chamilo\CoreBundle\Repository\Node\CourseRepository;
+use Chamilo\CoreBundle\Repository\SessionRepository;
+use Chamilo\CourseBundle\Repository\CDocumentRepository;
+use Chamilo\CourseBundle\Repository\CGroupRepository;
+use DocumentManager;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpKernel\Attribute\AsController;
+
+#[AsController]
+class DocumentUsageAction extends AbstractController
+{
+    public function __construct(
+        private readonly CourseRepository $courseRepository,
+        private readonly CDocumentRepository $documentRepository,
+        private readonly CGroupRepository $groupRepository,
+        private readonly SessionRepository $sessionRepository,
+    ) {}
+
+    public function __invoke($cid): JsonResponse
+    {
+        $courseId = (int) $cid;
+        $sessionId = api_get_session_id();
+        $groupId = api_get_group_id();
+
+        $courseEntity = $this->courseRepository->find($courseId);
+        if (!$courseEntity) {
+            return new JsonResponse(['error' => 'Course not found'], 404);
+        }
+
+        $sessionEntity = api_get_session_entity();
+
+        $totalQuotaBytes = ($courseEntity->getDiskQuota() * 1024 * 1024) ?? DEFAULT_DOCUMENT_QUOTA;
+        $usedQuotaBytes = $this->documentRepository->getTotalSpaceByCourse($courseEntity);
+
+        $chartData = [];
+
+        // Process sessions
+        $this->processCourseSessions($courseEntity, $sessionId, $totalQuotaBytes, $usedQuotaBytes, $chartData);
+
+        // Process groups
+        $this->processCourseGroups($courseEntity, $groupId, $totalQuotaBytes, $usedQuotaBytes, $chartData);
+
+        // Process user documents
+        $users = $this->courseRepository->getUsersByCourse($courseEntity);
+        foreach ($users as $user) {
+            $userId = $user->getId();
+            $userName = $user->getFullName();
+            $this->processUserDocuments($courseEntity, $sessionEntity, $userId, $userName, $totalQuotaBytes, $chartData);
+        }
+
+        // Add available space
+        $availableBytes = $totalQuotaBytes - $usedQuotaBytes;
+        $availablePercentage = $this->calculatePercentage($availableBytes, $totalQuotaBytes);
+
+        $chartData[] = [
+            'label' => addslashes(get_lang('Available space')).' ('.format_file_size($availableBytes).')',
+            'percentage' => $availablePercentage,
+        ];
+
+        return new JsonResponse([
+            'datasets' => [
+                ['data' => array_column($chartData, 'percentage')],
+            ],
+            'labels' => array_column($chartData, 'label'),
+        ]);
+    }
+
+    private function processCourseSessions($courseEntity, int $sessionId, int $totalQuotaBytes, int &$usedQuotaBytes, array &$chartData): void
+    {
+        $sessions = $this->sessionRepository->getSessionsByCourse($courseEntity);
+
+        foreach ($sessions as $session) {
+            $quotaBytes = $this->documentRepository->getTotalSpaceByCourse($courseEntity, null, $session);
+
+            if ($quotaBytes > 0) {
+                $sessionName = $session->getTitle();
+                if ($sessionId === $session->getId()) {
+                    $sessionName .= ' * ';
+                }
+
+                $usedQuotaBytes += $quotaBytes;
+                $chartData[] = [
+                    'label' => addslashes(get_lang('Session').': '.$sessionName).' ('.format_file_size($quotaBytes).')',
+                    'percentage' => $this->calculatePercentage($quotaBytes, $totalQuotaBytes),
+                ];
+            }
+        }
+    }
+
+    private function processCourseGroups($courseEntity, int $groupId, int $totalQuotaBytes, int &$usedQuotaBytes, array &$chartData): void
+    {
+        $groupsList = $this->groupRepository->findAllByCourse($courseEntity)->getQuery()->getResult();
+
+        foreach ($groupsList as $groupEntity) {
+            $quotaBytes = $this->documentRepository->getTotalSpaceByCourse($courseEntity, $groupEntity->getIid());
+
+            if ($quotaBytes > 0) {
+                $groupName = $groupEntity->getTitle();
+                if ($groupId === $groupEntity->getIid()) {
+                    $groupName .= ' * ';
+                }
+
+                $usedQuotaBytes += $quotaBytes;
+                $chartData[] = [
+                    'label' => addslashes(get_lang('Group').': '.$groupName).' ('.format_file_size($quotaBytes).')',
+                    'percentage' => $this->calculatePercentage($quotaBytes, $totalQuotaBytes),
+                ];
+            }
+        }
+    }
+
+    private function processUserDocuments($courseEntity, $sessionEntity, int $userId, string $userName, int $totalQuotaBytes, array &$chartData): void
+    {
+        $documentsList = $this->documentRepository->getAllDocumentDataByUserAndGroup($courseEntity);
+        $userQuotaBytes = 0;
+
+        foreach ($documentsList as $documentEntity) {
+            if ($documentEntity->getResourceNode()->getCreator()?->getId() === $userId
+                && 'file' === $documentEntity->getFiletype()) {
+                $resourceFiles = $documentEntity->getResourceNode()->getResourceFiles();
+                if (!$resourceFiles->isEmpty()) {
+                    $userQuotaBytes += $resourceFiles->first()->getSize();
+                }
+            }
+        }
+
+        if ($userQuotaBytes > 0) {
+            $chartData[] = [
+                'label' => addslashes(get_lang('Teacher').': '.$userName).' ('.format_file_size($userQuotaBytes).')',
+                'percentage' => $this->calculatePercentage($userQuotaBytes, $totalQuotaBytes),
+            ];
+
+            // Handle session context
+            if ($sessionEntity) {
+                $sessionTotalQuota = $this->calculateSessionTotalQuota($sessionEntity);
+                if ($sessionTotalQuota > 0) {
+                    $chartData[] = [
+                        'label' => addslashes(\sprintf(get_lang('TeacherXInSession'), $userName)),
+                        'percentage' => $this->calculatePercentage($userQuotaBytes, $sessionTotalQuota),
+                    ];
+                }
+            }
+        }
+    }
+
+    private function calculateSessionTotalQuota($sessionEntity): int
+    {
+        $total = 0;
+        $sessionCourses = $sessionEntity->getCourses();
+
+        foreach ($sessionCourses as $courseEntity) {
+            $total += DocumentManager::get_course_quota($courseEntity->getId());
+        }
+
+        return $total;
+    }
+
+    private function calculatePercentage(int $bytes, int $totalBytes): float
+    {
+        if (0 === $totalBytes) {
+            return 0.0;
+        }
+
+        return round(($bytes / $totalBytes) * 100, 2);
+    }
+}
diff --git a/src/CoreBundle/Migrations/AbstractMigrationChamilo.php b/src/CoreBundle/Migrations/AbstractMigrationChamilo.php
index 227b255e221..44eda5420f7 100644
--- a/src/CoreBundle/Migrations/AbstractMigrationChamilo.php
+++ b/src/CoreBundle/Migrations/AbstractMigrationChamilo.php
@@ -29,7 +29,6 @@
 use Psr\Log\LoggerInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\Filesystem\Filesystem;
-use Symfony\Component\Finder\Finder;
 use Symfony\Component\HttpFoundation\File\UploadedFile;
 
 abstract class AbstractMigrationChamilo extends AbstractMigration
diff --git a/src/CoreBundle/Migrations/Schema/V200/Version20250306101000.php b/src/CoreBundle/Migrations/Schema/V200/Version20250306101000.php
index 61c92946f6d..712467be6c5 100644
--- a/src/CoreBundle/Migrations/Schema/V200/Version20250306101000.php
+++ b/src/CoreBundle/Migrations/Schema/V200/Version20250306101000.php
@@ -11,7 +11,6 @@
 use Chamilo\CoreBundle\Migrations\AbstractMigrationChamilo;
 use Doctrine\DBAL\Exception;
 use Doctrine\DBAL\Schema\Schema;
-use Symfony\Component\Finder\Finder;
 
 final class Version20250306101000 extends AbstractMigrationChamilo
 {
@@ -29,7 +28,7 @@ public function up(Schema $schema): void
                 $pluginTitle = (string) $pluginTitle['title'];
             }
 
-            if (!array_key_exists($pluginTitle, $replacements)) {
+            if (!\array_key_exists($pluginTitle, $replacements)) {
                 continue;
             }
 
diff --git a/src/CoreBundle/Migrations/Schema/V200/Version20251009111300.php b/src/CoreBundle/Migrations/Schema/V200/Version20251009111300.php
index 53cf48d5ede..9ed54235da5 100644
--- a/src/CoreBundle/Migrations/Schema/V200/Version20251009111300.php
+++ b/src/CoreBundle/Migrations/Schema/V200/Version20251009111300.php
@@ -18,20 +18,17 @@ public function getDescription(): string
         return 'Fix plugin titles and remove plugins without a corresponding directory';
     }
 
-    /**
-     * @inheritDoc
-     */
     public function up(Schema $schema): void
     {
         $replacements = self::pluginNameReplacements();
         $idListToDelete = [];
 
-        $pluginRows = $this->connection->executeQuery("SELECT id, title, source FROM plugin")->fetchAllAssociative();
+        $pluginRows = $this->connection->executeQuery('SELECT id, title, source FROM plugin')->fetchAllAssociative();
 
         foreach ($pluginRows as $pluginRow) {
             $title = $pluginRow['title'];
 
-            if (!array_key_exists($title, $replacements)) {
+            if (!\array_key_exists($title, $replacements)) {
                 $idListToDelete[] = $pluginRow['id'];
 
                 continue;
diff --git a/src/CoreBundle/Repository/Node/CourseRepository.php b/src/CoreBundle/Repository/Node/CourseRepository.php
index 4bff028b532..02e93199e04 100644
--- a/src/CoreBundle/Repository/Node/CourseRepository.php
+++ b/src/CoreBundle/Repository/Node/CourseRepository.php
@@ -449,4 +449,23 @@ public function getCoursesByAccessUrl(AccessUrl $url): array
             ->getResult()
         ;
     }
+
+    public function getUsersByCourse(Course $course): array
+    {
+        $qb = $this->getEntityManager()->createQueryBuilder();
+
+        $qb
+            ->select('DISTINCT user')
+            ->from(User::class, 'user')
+            ->innerJoin(CourseRelUser::class, 'courseRelUser', Join::WITH, 'courseRelUser.user = user.id')
+            ->where('courseRelUser.course = :course')
+            ->setParameter('course', $course)
+            ->orderBy('user.lastname', 'ASC')
+            ->addOrderBy('user.firstname', 'ASC')
+        ;
+
+        $query = $qb->getQuery();
+
+        return $query->getResult();
+    }
 }
diff --git a/src/CoreBundle/Repository/SessionRepository.php b/src/CoreBundle/Repository/SessionRepository.php
index 61a1a049e03..71fec29573d 100644
--- a/src/CoreBundle/Repository/SessionRepository.php
+++ b/src/CoreBundle/Repository/SessionRepository.php
@@ -86,6 +86,18 @@ public function getSessionsByUser(User $user, AccessUrl $url): QueryBuilder
         return $qb;
     }
 
+    public function getSessionsByCourse(Course $course): array
+    {
+        $qb = $this->createQueryBuilder('s');
+
+        return $qb
+            ->innerJoin('s.courses', 'src')
+            ->where($qb->expr()->eq('src.course', ':course'))
+            ->setParameter('course', $course)
+            ->getQuery()->getResult()
+        ;
+    }
+
     /**
      * @return array<int, Session>
      *
diff --git a/src/CourseBundle/Entity/CDocument.php b/src/CourseBundle/Entity/CDocument.php
index 03c7d29f15d..570f8ac8731 100644
--- a/src/CourseBundle/Entity/CDocument.php
+++ b/src/CourseBundle/Entity/CDocument.php
@@ -19,6 +19,7 @@
 use ApiPlatform\Serializer\Filter\PropertyFilter;
 use Chamilo\CoreBundle\Controller\Api\CreateDocumentFileAction;
 use Chamilo\CoreBundle\Controller\Api\DocumentLearningPathUsageAction;
+use Chamilo\CoreBundle\Controller\Api\DocumentUsageAction;
 use Chamilo\CoreBundle\Controller\Api\DownloadSelectedDocumentsAction;
 use Chamilo\CoreBundle\Controller\Api\ReplaceDocumentFileAction;
 use Chamilo\CoreBundle\Controller\Api\UpdateDocumentFileAction;
@@ -190,6 +191,16 @@
                 ],
             ]
         ),
+        new Get(
+            uriTemplate: '/documents/{cid}/usage',
+            controller: DocumentUsageAction::class,
+            openapiContext: [
+                'summary' => 'Get usage/quota information for documents.',
+            ],
+            security: "is_granted('ROLE_USER')",
+            read: false,
+            name: 'api_documents_usage'
+        ),
     ],
     normalizationContext: [
         'groups' => ['document:read', 'resource_node:read'],
diff --git a/src/CourseBundle/Repository/CDocumentRepository.php b/src/CourseBundle/Repository/CDocumentRepository.php
index 8149ea5733c..285e0d6c788 100644
--- a/src/CourseBundle/Repository/CDocumentRepository.php
+++ b/src/CourseBundle/Repository/CDocumentRepository.php
@@ -366,6 +366,87 @@ public function findChildNodeByTitle(ResourceNode $parent, string $title): ?Reso
         ;
     }
 
+    /**
+     * Fetches all document data for the given user/group using Doctrine ORM.
+     *
+     * @return CDocument[]
+     */
+    public function getAllDocumentDataByUserAndGroup(
+        Course $course,
+        string $path = '/',
+        int $toGroupId = 0,
+        ?int $toUserId = null,
+        bool $search = false,
+        ?Session $session = null
+    ): array {
+        $qb = $this->createQueryBuilder('d');
+
+        $qb->innerJoin('d.resourceNode', 'rn')
+            ->innerJoin('rn.resourceLinks', 'rl')
+            ->where('rl.course = :course')
+            ->setParameter('course', $course)
+        ;
+
+        // Session filtering
+        if ($session) {
+            $qb->andWhere('(rl.session = :session OR rl.session IS NULL)')
+                ->setParameter('session', $session)
+            ;
+        } else {
+            $qb->andWhere('rl.session IS NULL');
+        }
+
+        // Path filtering - convert document.lib.php logic to Doctrine
+        if ('/' !== $path) {
+            // The original uses LIKE with path patterns
+            $pathPattern = rtrim($path, '/').'/%';
+            $qb->andWhere('rn.title LIKE :pathPattern OR rn.title = :exactPath')
+                ->setParameter('pathPattern', $pathPattern)
+                ->setParameter('exactPath', ltrim($path, '/'))
+            ;
+
+            // Exclude deeper nested paths if not searching
+            if (!$search) {
+                // Exclude paths with additional slashes beyond the current level
+                $excludePattern = rtrim($path, '/').'/%/%';
+                $qb->andWhere('rn.title NOT LIKE :excludePattern')
+                    ->setParameter('excludePattern', $excludePattern)
+                ;
+            }
+        }
+
+        // User/Group filtering
+        if (null !== $toUserId) {
+            if ($toUserId > 0) {
+                $qb->andWhere('rl.user = :userId')
+                    ->setParameter('userId', $toUserId)
+                ;
+            } else {
+                $qb->andWhere('rl.user IS NULL');
+            }
+        } else {
+            if ($toGroupId > 0) {
+                $qb->andWhere('rl.group = :groupId')
+                    ->setParameter('groupId', $toGroupId)
+                ;
+            } else {
+                $qb->andWhere('rl.group IS NULL');
+            }
+        }
+
+        // Exclude deleted documents (like %_DELETED_% in original)
+        $qb->andWhere('rn.title NOT LIKE :deletedPattern')
+            ->setParameter('deletedPattern', '%_DELETED_%')
+        ;
+
+        // Order by creation date (equivalent to last.iid DESC)
+        $qb->orderBy('rn.createdAt', 'DESC')
+            ->addOrderBy('rn.id', 'DESC')
+        ;
+
+        return $qb->getQuery()->getResult();
+    }
+
     /**
      * Ensure "Learning paths" exists directly under the course resource node.
      * Links are created for course (and optional session) context.