Maintain the list of uploaded files or something similar (aka: preventing upload of already present files)

Steps to reproduce

1. Use the latest app version from Testflight version
2. to have like 200 files to upload into server
3. the upload is not working correctly due to unknown reason
4. install previous version from Testflight for more tests
5. all client configuration is reset
6. remember the previous configuration
7. configure the app
8. enable the checkbox to "upload all files" from my iPhone

Expected behaviour

Upload only files that are not already present into server at the same path/directory

Actual behaviour

Seems all files are uploaded into the same place. Fortunally no duplicates found, seems the upload is only to check the file

Reasoning or why should it be changed/implemented?

IMHO, No one should consume time and resources to upload hundred of files into the same place only for checking if is already present, without any other reason. IMHO, maybe can using a checksum or filename and size or something similar to verify if a file is already present?

Environment data

iOS version: 14.4.2

Nextcloud iOS app version: 3.5.0.11

Server operating system: Debian

Web server: nginx

Database: postgresql - Debian 13.2-1.pgdg100+1

PHP version: PHP 7.3.27-1~deb10u1

Nextcloud version: 21.0.0

Start by reproducing the upload-all flow described for iOS 14.4.2, Nextcloud iOS 3.5.0.11, and Nextcloud 21 with files that already exist on the server. The work is done when files already present at the same path are skipped instead of being uploaded for checking.