but reliable if you put a UPS on them, and don't turn them off while system running like any other removable drive.
I tried seagate free-agent 750 gig drive with dual USB and eSata. Couldn't use the e-Sata option as the only slot my PC had was PCI and this was PCI-Xpress which won't go in a PCI slot.
The free-agent had other probs:
1) it got quite hot underneath, and I had it on a wood shelf, I was getting worried.
2) the power off switch would not work. was one of those d@#$% touch switch, not a real switch. would not go off no matter how long I held it. It would go ON tho. (this was eve with the computer system it was attached too off).
3) my PC would not even get to BIOS password prompt if the drive was attached while booting. (This is with my bios setting to boot off internal hard drive only). Yet if I turned the drive on after PC booted would recognize OK.
I used two earlier 300 gig models as backups and never had a problem except once when power went out when I was backing up, and the drive was not on a UPS, which I changed immediately. For some odd reason they transfer large files real quickly reading from the USB drive but takes much longer writing to them on my desktop.
I used one of the drives for quite a while as primary storage (and editing) of very large powerpoint presentations. 200-500 megs each. WOrked great but slow saving the files. Even slow now (but not as slow) with these huge files on my 1T SATA drive saving huge files.