SanDisk's Extreme Pro SSD has been recently updated, adding USB4 connectivity. It's a good, but expensive, external option for Mac owners assuming you never need to connect it to Windows.

SanDisk 256GB Extreme PRO: ... This handy 128GB USB-C flash drive makes my job a breeze — and it's just $17 right now. This portable SSD changed how I work on the go — and I’m kinda in love.

However, closer inspection reveals that the Extreme Pro With USB4 is quite a bit larger than other SanDisk drives that we’ve tested in the past, measuring 11.9mm thick, 58.7mm wide, and 140mm long.

The humble USB flash drive shares files, backs up photos, ... SanDisk Extreme Pro (128GB) Now 18% Off. $42 $35 at Amazon. $169 $35 at Walmart $35 at B&H Photo. Pros. Fast read and write speeds; ...

Compared to a USB 3.2 SSD, the SanDisk Extreme PRO with USB4 is a beast. At more than double the best speed of even a Gen 2x2 drive in reading and writing.