Thank you for taking the time to reply.
I have been busy with other things, but finally I think I have done what you suggested.
I am attaching a syslog, the two commands you suggested, run before attaching the usb drive (elements) and again after attaching it, and also a Windws screen dump showing that although I can see my flash drive and the two disks in the array, I can't see my SNAP attached drive.
Thanks.
root@ukutlxd01:~# /boot/config/snap/snap.sh -listDevInfo
unRAID=Yes SNAP=No 3522 /dev/sda ata-Hitachi_HDS5C3020ALA632_ML0220F311TBND
unRAID=Yes SNAP=No 3584 /dev/sdb ata-WDC_WD20EARS-00MVWB0_WD-WCAZA3244757
unRAID=Yes SNAP=No 3522 /dev/sda scsi-SATA_Hitachi_HDS5C30_ML0220F311TBND
unRAID=Yes SNAP=No 3584 /dev/sdb scsi-SATA_WDC_WD20EARS-00_WD-WCAZA3244757
unRAID=No SNAP=No 3678 /dev/sdc usb-SanDisk_U3_Cruzer_Micro_43184218C210FC6A-0:0
unRAID=No SNAP=No 13279 /dev/sdd usb-WD_10EADS_External_57442D574341563531333234383032-0:0
The contents of your snap.list file is:
57442D57434156353133234383032=
57442D57434156353133234383032-0:0=
57442D574341563531333234383032=elements
So what has happened is you have tried to add the drive to SNAP 3 times. Two of those times the identifying serial number was incorrect. I highlighted them in green. The correct one unfortunately doesn't have the share name so it's not working.
You can either edit the snap.list file and fix it or delete the file and add the drive to SNAP once more like this:
snap.sh -a 57442D57434156353133234383032-0:0 elements
After that the snap.list file should have one entry looking like this:
57442D57434156353133234383032-0:0=elements