I have QNAP TS-459 Pro and the latest firmware. It has RAID5 (4x1Tb WD Black -series disks). It's been used for an ARCServe backup drive and network recycle bin has been enabled. ARCserve has rotation job configured and those old out-dated backups are in network recycle bin. I have 4Mb disk space only left! If i try to empty the recycle bin from QNAP it seems that it does what it should do, but after few minutes it just logs me out and when i log in i can see that disk space is still full because of that recycle bin! I cannot delete those files. I have booted the device, disabled the recycle bin. No go!