What's a good portable reliable external 2.5" USB HDD to get thesedays?

Hello.

It looks like this 6 years old 500 GB Seagate FreeAgent Go HDD is dying
according to GMsmartControl v0.8.7's extended test results on a very
old, updated Windows XP Pro SP3 (couldn't do SMART tests on 2 MBPs):
http://paste2.org/z1Kv4Vpk ...

Are there any current good low cost ones from local CA(lifornia) stores
(WalMart, Costco, Best Buy, Fry's Electronics, etc.) in Los Angeles
(LA), Orange County (OC), etc. to buy/purchase quickly?
http://www.salescircular.com/ca/computer/hdiskp.shtml is outdated (no
updates for this week). The new HDD will be mainly used for light
portability, backups, and storages. It needs to be able to handle
multiple partitions' file systems (MS' FAT and Apple's encrypted HFS
including its Time Machine) and various computers (Macs and PCs with
Windows, Mac OS X, and Linux).

Thank you in advance.
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