Thank you, that gives me the label.
I also managed to get it by running the same script as the web-if which gives me a little more info
/mnt/hd2/mod/webif/cgi-bin/usbinfo.jim
Content-Type: application/json; charset="UTF-8"; no-cache
Expires: -1
Connection: close
Pragma: no-cache
Cache-Control: no-cache
[
{
"LABEL": "HXBACKUP",
"USED": "92",
"MODEL": "Desktop",
"TYPE": "ntfs",
"SIZE": "1000202272768",
"MP": "/media/usb-drive1",
"VENDOR": "Seagate",
"UUID": "2248D7AE48D77ECB",
"DEV": "/dev/sda1",
"RDEV": "sda"
}
]