I don't see my files when i re-install an old disk into the NAS

Hi, i built an OMV NAS with Argon EON / OMV and wrote my data to a 2TB disk. I took that disk out to put a bigger disk in and when i re-install (plug-in) the old disk i do not see my old files. OMV show that the capacity is used and i can mount the disk and share it (SMB) but the disk looks empty.

I mounted the disk as /Media the first time but now my new disk is called /Media so i mounted the old disk as /backup.

Thanks for any help. i am desperate to get these files back

yes sorry it mounts as /dev/sda1 etc

yes it is mounted and shared but when i access through SMB it is empty

/srv/dev-disk-by-uuid-994cefd5-4459-41c4-a281-46a135f7e08d/backup

ls -lah /srv/dev-disk-by-uuid-994cefd5-4459-41c4-a281-46a135f7e08d/backup

total 20K

drwxrwsr-x 2 root users 4.0K May 16 11:44 .

drwxr-xr-x 6 root root 4.0K May 4 2010 ..

-rw-rw-r-- 1 eric users 6.1K May 16 16:07 .DS_Store

-rw-rw-r-- 1 eric users 4.0K May 16 11:44 ._.DS_Store

I am accesing as eric