Samsung 870 EVO 2TB internal SSD deal: $399.99

SAVE 62%: As of July 20, you can get Samsung's 870 EVO SATA III (2TB) internal SSD for $399.99, down from $1,039.99, at Amazon. That's a 62% discount or $640 in savings.

If your computer's been hissing at you or freezing up on basic tasks, you might need some extra storage space. And right now, Amazon's got a ton of deals going on SSDs; there's just one thing you need to know: Most of these deals are fake.

Okay, maybe not all of them, but there's a widespread counterfeit scam going on right now that you need to watch out for. Scammers are selling counterfeit 2TB SSDs that look identical to the real thing but only hold about 120GB of storage. Once the drive is full, it will fail, and your files will be unreadable.

The good news? If you know what to look for, you can dodge the scammers and score a great drive for an affordable price. For instance, Amazon has the Samsung 870 EVO (2TB) internal SSD listed for $399.99 right now. That's a 62% discount or a $640 price cut.

If you want to make sure you're getting the real deal, use this checklist before and after you buy:

• Check the seller first: This specific $399.99 listing is shipped and sold directly by Amazon.com and links straight to the official Samsung storefront. That's your first green flag. If you see SSDs sold by random third-party marketplace sellers, don't buy them.

• Inspect the physical drive: Once your package arrives, look closely at the sticker. If the edges are sloppy or it looks like it's been peeled off and reapplied at some point, be suspicious.

• Run a capacity test: Don't trust it with important files until you run a test through the Samsung Magician software to make sure the internal serial number matches the sticker, or use a free tool like H2testw to verify it's a true 2TB drive.