newegg Memorial Day sale on storage devices
Western Digital My Book Essential 2TB USB 2.0 External Hard Drive
$79.99 with promo code EMCKEHD22 - Free Shipping - 2 year warranty
Seagate Expansion 3TB USB 2.0 Black External Hard Drive STAY3000100
$119.99 with promo code EMCKEHD25 - Free Shipping - 5 year warranty*
I'm only window shopping not buying (so far), but would probably get the 3TB Seagate. Same cost per TB, and I like their 5 year warranty. I have several large external Western Digital and Seagate USB 2.0 drives and they all work fine for data storage. Of course they're not fast enough for regular access of EGTB's in conjunction with chess engines. They would slow down the engine too much.
Incidentally I now have the complete 6-piece Nalimov EGTB's (all except the 5-1's) thanks to a friend in France and can provide copying service in USA to external USB 2.0/3.0 drives. 1.2TB minimum free space needed. PM me if interested.
*correction-apparently it's 1 year warranty on the Seagate 3TB drive (not 5 years)