Nov 07, 2021 · X1 Extreme (Gen 2) 3. (1 days ago) Costco has SanDisk Extreme 1TB Portable Solid State Drive for $119. I bought this from Costco SanDisk 1TB Extreme Portable External SSD - It has been little over a month and I used it only for the last 2 weeks. (1) - *1GB = 1,000,000,000 bytes 1TB=1,000,000,000,000 bytes. Buy now & save $85.