QNAP TS-421U TurboNAS Firmware 3.8.3.0426

Fixes:
- Support Seagate 4TB Backup Plus 4TB USB 3.0 drive for Mac (STCB4000103)
- Updated the time zone of Minsk to GMT+03:00
- Removed Windows Live Messenger notification support due to Microsoft service termination
- Improved RTRR Real-time Mode stability while uploading large amounts of files concurrently
- Improved the compatibility with Citrix Xen Server if CHAP authentication is used
- Improved the stability of VAAI iSCSI
- Fixed the PDF or Adobe-related file, and ChronoSync (.sync) file visibility issue with AFP connection
- Fixed the color label issue on AFP connection
- Fixed the auto-rescan issue when the NAS restarts if the Media Library is set in Manual Scan mode
- Fixed the login issue of new user accounts from Standalone Application Users in Multimedia/Photo/Music Stations
- Fixed the public album visibility issue in Multimedia Station when a new user account from System Users logs in
- Fixed the Wake-On-LAN (WOL) issue on TS-509/809 Pro
- Fixed inaccurate CPU temperature detection on some models
- Fixed the system error while deleting a new user account via CSV User Import function with Advanced Folder Permission enabled
- Fixed the Microsoft Networking Host Access Control wildcard issue in specific network configuration
- Fixed Amazon S3 backup issue when the file name contains [ or ]
- Fixed the Autorun.sh compatibility issue on ARM-based NAS
- Fixed the issue for truncated local & domain group name and permission settings if the name is over 40 characters long
- Fixed the "Relaunch upsd" issue

Note:

- TS-112, TS-212, TS-412 firmware cannot be downgraded after upgrading to firmware 3.8.3 or later.