Problems With External Drive For Storage (Not Recording)

[BPlayer]

I recently purchased a Seagate external drive for my Acronis ProTools backups and having issues with it. It either doesn't recognize the drive it all or locks the PC up. If I disable all the USB ports and reboot it, it "might" find it the 1st time however it makes the PC run at a crawl. If I restart the PC, it locks it up until I unplug the drive. I am certain it's not the drive because I can use that drive on my other PCs with no problems and I have the same problem with my 1 gig thumb drive on this (my dedicated audio) PC. Seagate won't help me because the drive works fine on other drives. I have updated the bios on the motherboard that the tech support from the company I purchased it from suggested.

F.Y.I. -I also tried a Western Digital MyBook external drive and got the same results.

The PC is almost new so I can ship it back where it was purchased to be repaired but I was hoping I might get some suggestions here. I really don't want to give this PC up for two weeks and its works great except for this problem.

All help appreciated!