diff --git a/src/context/local/localFile/infrastructure/EnvironmentLocalFileUploader.ts b/src/context/local/localFile/infrastructure/EnvironmentLocalFileUploader.ts
index 9f466773d..54b813da2 100644
--- a/src/context/local/localFile/infrastructure/EnvironmentLocalFileUploader.ts
+++ b/src/context/local/localFile/infrastructure/EnvironmentLocalFileUploader.ts
@@ -9,11 +9,10 @@ import { Either, left, right } from '../../../shared/domain/Either';
 import { DriveDesktopError } from '../../../shared/domain/errors/DriveDesktopError';
 import { deleteFileContentIPC } from '../../../../infra/ipc/files-ipc';
 import { logger } from '@internxt/drive-desktop-core/build/backend';
+import { MULTIPART_UPLOAD_SIZE_THRESHOLD } from '../../../shared/domain/UploadConstants';
 
 @Service()
 export class EnvironmentLocalFileUploader implements LocalFileHandler {
-  private static MULTIPART_UPLOAD_SIZE_THRESHOLD = 100 * 1024 * 1024; // 100MB
-
   constructor(
     private readonly environment: Environment,
     private readonly bucket: string,
@@ -21,7 +20,7 @@ export class EnvironmentLocalFileUploader implements LocalFileHandler {
 
   upload(path: AbsolutePath, size: number, abortSignal: AbortSignal): Promise<Either<DriveDesktopError, string>> {
     const fn: UploadStrategyFunction =
-      size > EnvironmentLocalFileUploader.MULTIPART_UPLOAD_SIZE_THRESHOLD
+      size > MULTIPART_UPLOAD_SIZE_THRESHOLD
         ? this.environment.uploadMultipartFile.bind(this.environment)
         : this.environment.upload.bind(this.environment);
 
@@ -35,7 +34,7 @@ export class EnvironmentLocalFileUploader implements LocalFileHandler {
       const state = fn(this.bucket, {
         source: readable,
         fileSize: size,
-        finishedCallback: (err: Error | null, contentsId: string) => {
+        finishedCallback: (err, contentsId) => {
           readable.close();
           stopwatch.finish();
 
@@ -47,6 +46,11 @@ export class EnvironmentLocalFileUploader implements LocalFileHandler {
             return resolve(left(new DriveDesktopError('UNKNOWN')));
           }
 
+          if (!contentsId) {
+            logger.error({ tag: 'SYNC-ENGINE', msg: '[ENVLFU UPLOAD ERROR] No contentsId returned' });
+            return resolve(left(new DriveDesktopError('UNKNOWN')));
+          }
+
           resolve(right(contentsId));
         },
         progressCallback: (progress: number) => {
diff --git a/src/context/shared/domain/UploadConstants.ts b/src/context/shared/domain/UploadConstants.ts
new file mode 100644
index 000000000..59b138a1f
--- /dev/null
+++ b/src/context/shared/domain/UploadConstants.ts
@@ -0,0 +1 @@
+export const MULTIPART_UPLOAD_SIZE_THRESHOLD = 100 * 1024 * 1024;
diff --git a/src/context/storage/TemporalFiles/infrastructure/downloader/TemporalFileDownloaderFactory.ts b/src/context/storage/TemporalFiles/infrastructure/downloader/TemporalFileDownloaderFactory.ts
index a16ca7a40..040c57f56 100644
--- a/src/context/storage/TemporalFiles/infrastructure/downloader/TemporalFileDownloaderFactory.ts
+++ b/src/context/storage/TemporalFiles/infrastructure/downloader/TemporalFileDownloaderFactory.ts
@@ -7,6 +7,7 @@ import { EnvironmentTemporalFileUploader } from '../upload/EnvironmentTemporalFi
 import { TemporalFileUploaderFactory } from '../../domain/upload/TemporalFileUploaderFactory';
 import { Replaces } from '../../domain/upload/Replaces';
 import { TemporalFile } from '../../domain/TemporalFile';
+import { MULTIPART_UPLOAD_SIZE_THRESHOLD } from '../../../../shared/domain/UploadConstants';
 
 @Service()
 export class TemporalFileDownloaderFactory implements TemporalFileUploaderFactory {
@@ -15,8 +16,6 @@ export class TemporalFileDownloaderFactory implements TemporalFileUploaderFactor
   private _replaces: Replaces | undefined = undefined;
   private _abortController: AbortController | undefined = undefined;
 
-  private static MULTIPART_UPLOAD_SIZE_THRESHOLD = 100 * 1024 * 1024; // 100MB
-
   constructor(
     private readonly environment: Environment,
     private readonly bucket: string,
@@ -94,7 +93,7 @@ export class TemporalFileDownloaderFactory implements TemporalFileUploaderFactor
     }
 
     const fn =
-      document.size.value > TemporalFileDownloaderFactory.MULTIPART_UPLOAD_SIZE_THRESHOLD
+      document.size.value > MULTIPART_UPLOAD_SIZE_THRESHOLD
         ? this.environment.uploadMultipartFile
         : this.environment.upload;
 
diff --git a/src/context/storage/TemporalFiles/infrastructure/upload/EnvironmentTemporalFileUploaderFactory.ts b/src/context/storage/TemporalFiles/infrastructure/upload/EnvironmentTemporalFileUploaderFactory.ts
index 4db2f7a3b..becd588ed 100644
--- a/src/context/storage/TemporalFiles/infrastructure/upload/EnvironmentTemporalFileUploaderFactory.ts
+++ b/src/context/storage/TemporalFiles/infrastructure/upload/EnvironmentTemporalFileUploaderFactory.ts
@@ -7,6 +7,7 @@ import { EnvironmentTemporalFileUploader } from './EnvironmentTemporalFileUpload
 import { TemporalFileUploaderFactory } from '../../domain/upload/TemporalFileUploaderFactory';
 import { Replaces } from '../../domain/upload/Replaces';
 import { TemporalFile } from '../../domain/TemporalFile';
+import { MULTIPART_UPLOAD_SIZE_THRESHOLD } from '../../../../shared/domain/UploadConstants';
 
 @Service()
 export class EnvironmentTemporalFileUploaderFactory implements TemporalFileUploaderFactory {
@@ -15,8 +16,6 @@ export class EnvironmentTemporalFileUploaderFactory implements TemporalFileUploa
   private _replaces: Replaces | undefined = undefined;
   private _abortController: AbortController | undefined = undefined;
 
-  private static MULTIPART_UPLOAD_SIZE_THRESHOLD = 100 * 1024 * 1024; // 100MB
-
   constructor(
     private readonly environment: Environment,
     private readonly bucket: string,
@@ -94,7 +93,7 @@ export class EnvironmentTemporalFileUploaderFactory implements TemporalFileUploa
     }
 
     const fn =
-      document.size.value > EnvironmentTemporalFileUploaderFactory.MULTIPART_UPLOAD_SIZE_THRESHOLD
+      document.size.value > MULTIPART_UPLOAD_SIZE_THRESHOLD
         ? this.environment.uploadMultipartFile.bind(this.environment)
         : this.environment.upload.bind(this.environment);