Thecus N3200XXX Series User Manual page 80

Once the Create button has been pressed with the Encryption checkbox
enabled, the following message pop-up will appear for confirmation.
After the RAID volume has been created, you may remove this USB disk until
the next time the system boots. The RAID volume can not be mounted if the
USB disk with key can not be found in any system USB port when the volume
is accessed. To activate the encrypted volume, plug the USB disk containing
the encryption key and into any system USB port.
We are strongly recommended copying the RAID volume encryption key to a
safe place. You can find the encryption key file from the USB disk in the
following format:
(RAID volume created date)_xxxxxx.key
WARNING
NOTE
RAID volumes with encryption enabled will be displayed with a key lock symbol next
to volume ID name.
Please keep USB disk in a safe place and also backup the encrypted key.
There is no way to rescue data back if the key
is lost.
1. With RAID volume encryption enabled, the system performance will
goes down.
2. With RAID volume encryption enabled, RAID volume expansion will
operated in off line mode.
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