Amazon offers its Prime members the SanDisk 128GB Ultra Fit USB 3.0 Flash Drive, model no. SDCZ43-128G-GAM46, for $28.79 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $8.) That's the lowest total price we could find by a buck, although we saw it for $4 less last month. It features read speeds of up to 150MB/sec and 128-bit AES encryption.