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The SanDisk ExtremeFit USB-C flash drive (512GB) is on sale for $99 for Amazon Prime Day. That's $20 off the regular price of $119.

The ExtremeFit lives up to its name as one of the smallest external storage devices I've ever seen -- about the size of a mouse dongle. It comes in several storage configurations, from 128GB up to 1 TB. Luckily, the most practical size is the one that's on sale: 512GB for $99, which is 17% off. 

Also: June Prime Day live blog 2026: We're tracking Amazon deals on SSDs, TVs, laptops and more

I recently reviewed the ExtremeFit and found it to be about as plug-and-play as it gets. It doesn't require any particular software or formatting, just insert it into your USB-C port for read speeds up to 400 MB/s. 

To put the 512GB in perspective, that's enough storage to equal a whole other laptop, with enough space for thousands of files, including large 4K video files, image files, and renders, and hundreds of hours of full-length movies.

I'd recommend the SanDisk ExtremeFit for creators, professionals, and anyone who needs external storage but doesn't have a lot of room for bulky or expensive drives. 

Also: I tested the world's smallest 1TB SSD drive, and it's biggest downside shouldn't surprise you

Lastly, it's compatible with PCs, Macs, Chromebooks, and iPads, so you can use it across any of your devices. Just keep in mind that the device is indeed very small and could be easily misplaced for some people. I recommend keeping it with your other designated tech items, or simply keep it plugged into your laptop's USB-C port. 

How I rated this deal 

I gave this deal a 3/5 because it's 17% off but still right at the $99 mark. If it were to dip below that amount, I would rate the deal higher.