Detect SSD also if sdb and not sda

[rootzoll]

This was the setup of a Raspi4 with external SSD .. make sure next datadrive script can detect SSD with correct dev

[email protected]:~ ₿ lsblk
NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
sdb           8:16   0 931.5G  0 disk
└─sdb1        8:17   0 931.5G  0 part
mmcblk0     179:0    0  29.8G  0 disk
├─mmcblk0p1 179:1    0   512M  0 part /boot/firmware
└─mmcblk0p2 179:2    0  29.3G  0 part /
zram0       253:0    0   4.6G  0 disk [SWAP]