VirtualStaton 3.0.2385
Hello,
Warning if you use virtualstation and need to schedule backup !!!
Each time you backup a vm, the process will leave a snapshot of the disk. I Have asked the support of QNAP and the response : after 17 backup, he will remove the oldest. So you will have big problem with the perf and so on...
If someone can help on this topic, he is welcome

In the version qnap 4.2, the backup process works fine
1. take a snapshot
2. make backup
3. pause vm
4. remove snapshot
Kind regards
Fabrice