So, let's say you don't have TRIM available on your external 500.GB USB3 connected SSD. Let's also say your 500.GB SSD is filled up, but it has 10.GB of over-provisioning. You then delete a 30.GB file ...

There's something I don't understand about TRIM in solid state drives (SSDs). Wikipedia says, "The TRIM command enables an operating system to notify the SSD of pages which no longer contain valid ...

It used to be smart PC maintenance, but it's terrible for your SSD.

Reader Richard Spitzer is concerned about using a third-party SSD drive with his Mac running Yosemite. He writes: I just read an article that Apple is disabling the TRIM function for third-party SSDs ...

Apple has added limited TRIM support to the latest developer release of Mac OS X 10.7 Lion, which should enhance the long term performance of Solid State Drives. While Apple has already started ...