RYAT3, there is one problem with that program.
from the manual.
1.5 Supported file-systems
Recover My Files has full Unicode support and can recover files created in any language.
Recover My Files supports the recovery of:
Windows FAT12/16/32/exFAT, NTFS, file-systems;
Macintosh HFS, HFS+ file-systems;
Nowhere does it mention Linux or Ext3/4 as being recoverable.
The only reliable way of recovering some of the data is to take one of the disks to a data recovery company.
There is the possibility of putting one of the disks in a USB/SATA adapter/caddy and using a Linux computer to examine the disk and use Linux disk recovery tools but requires a good working knowledge of file structures and segments.
I must confess that I am at a loss as to how anyone can mistakenly log on to the wrong NAS using the webUI.