Synology Photos 4+

Important Note:
1. A local item will be deleted when you delete its copy from the Synology Photos mobile app. However, if you delete the item directly from your phone's built-in app, the copy will still exist on your Synology NAS.
2. Changes to "Free Up Space” feature:
- once a file is backed up or uploaded to Synology NAS, Synology Photos flags it as ready to be freed up from your phone.
- if you move the file's copy on Synology NAS to a different Space, you won’t be able to free up the original file from your phone.
3. For users updating from version 1.5: Updating to this version will not trigger duplicating files due to renaming or moving them to a different Space.
4. For users updating from version 2.0: If you have previously renamed the files or moved them to another Space, to prevent them from being backed up again and creating duplicated files, turn off the photo backup. Re-enable it and choose "back up new photos only”.

What's New:
1. Supports viewing all photos, regardless of whether they are backed up or not, in the mobile app after backup is enabled.
2. Supports backing up modified photos again to keep all changes after backup is enabled.
3. Supports the notification for out-of-sync changes on the Synology Photos mobile app when moving photos to another Space or deleting them from File Station, Synology Photos web portal, SMB, etc.
4. Supports backing up and uploading multiple files at the same time for better efficiency.
5. Supports different backup options:
- Back up new photos only: Back up photos and videos taken from now on. Changes made to previous items will also be backed up as new files.
- Resume tasks: Continue the progress of the last backup task. Changes made to previous photos will be backed up as new files.
- Scan and back up all photos: If backed-up items have been moved to another Space, renamed, or deleted from Synology NAS, they will be backed up again. You may need to sign out of the Synology Photos mobile app and sign in again to select this option.

Fixed Issues:
1. Fixed an issue where a download might not be successful if you leave lightbox mode before it completes.
2. Fixed an issue where the limit of the cache size might be exceeded.
3. Fixed an issue when updating to version 2.0 where crash might happen unexpectedly.