WD my Pastport vs windows xp

It’s most probably GPT partitioned …
Which Windows XP 32-Bit won’t read (only Windows XP 64-Bit will recognize GPT and of course Windows 7,8,10)

See my post here on how to check

If it is GPT … then you’ll need to Re-Partition to MBR (2 ways to do this … one way, will format and wipe your data, the second way using 3rd software you can convert GPT > MBR without data loss)

Another post here … were the problem was solved

Also remember, for PS3 compatibility you will need to format the drive FAT32 (which has a 4GB Max Limit for files)