The new i-Disk Rex100 could be the tiniest USB 3.0 flash drive in the world that offers 128GB of storage.

LAS VEGAS--It seems that portable hard drives get progressively smaller as CES 2011 continues.

Yesterday, Verbatim introduced the USB 3.0 External SSD that beat the recently reviewed LaCie FastKey both in terms of storage space and portability. Now, as the show is nearing its end, Pretec, a company known more as a maker of system memory, unveiled an ultracompact USB 3.0 flash drive of its own, the i-Disk Rex100.

Measuring 2.9 inches by 0.7 inch by 0.2 inch, the i-Disk Rex100 is arguably the tiniest flash drive in the world that offers 128GB of storage space. The drive supports USB 3.0, which translates into much better performance compared with USB 2.0 flash drives. It shares the same design as the LaCie FastKey, taking the shape of a thumbdrive, but about is 40 percent smaller.

The i-Disk Rex100 is available later this month in 32GB, 64GB, and 128GB capacities. The price has not yet been announced, but like all SSD-based external hard drives, it won't be cheap.

Other than the i-Disk100, Pretec also unveiled the i-Disk300, a superthin SSD-based USB 3.0 external drive that offers up to 128GB of storage, and the first USB 3.0 flash card reader, the Pretec P240. These two will also be available later this month.