You Need to Do More Than Delete Files on an External Drive to Make Them Permanently Disappear

There’s a trick to thoroughly wiping all your data before you junk your old external solid state drive—or even computer.
MUO on MSN

This is what happens to a file when you delete it from your SSD

What this means is that the deleted file is not fully gone and can still be recovered. It's only when the data is overwritten ...
Tidbits

How to Securely Erase a Mac’s SSD or Hard Drive

Over on TidBITS Talk, user Lucas043 posed a question that prompted a fascinating discussion. Lucas043 has a Samsung Portable T7 SSD being used for backup. The SSD has intermittent access problems and ...
Ars Technica

Ask Ars: How can I safely erase the data from my SSD drive?

Ask Ars dives into the swampy waters of secure data deletion on solid state drives, why traditional methods don't work, and what recourse you have.