A:Answer Hello Matt,
The Seagate Expansion Portable 3.0 hard drive is not compatible with Windows XP and Vista. Per data sheet these hard drives require Windows® 10, Windows 8 or Windows 7 operating system.
Here is the link to the data sheet:
https://www.seagate.com/www-content/datasheets/pdfs/expansion-portable-DS1842-6-1907-WW-en_EM.pdf
Unfortunately Windows XP and Vista are not supported anymore, so there are no current hard drives that could be recommended.
Regards,
Zac
Seagate Support