Best Buy offers the SanDisk 64GB Ultra USB 3.0 Flash Drive, model no. SDCZ48-064G-A46, for $19.99 with free shipping. That's $5 under our March mention and the best price we've seen. (It's also a current price low by $4.) It features read speeds of up to 80MB/s and SanDisk SecureAccess software, which enables password protection.