Can't Eject an External Drive: What's Holding It Open
Why Windows and macOS refuse to eject a drive that is in use, what eject actually does, and how to find the program responsible without risking your files.
macos
4 articles.
exFAT, NTFS or APFS: Formatting a Drive for Mac and Windows
Why a Mac can read a Windows drive but not write to it, what exFAT gives up to work on both, and which format fits which drive.
Why a 1TB Drive Shows Up as 931GB, and Where the Rest Goes
A new 1TB drive shows 931GB in Windows and something else on a Mac. Nothing is missing. Here is the arithmetic, and how to spot a gap it doesn't explain.
What "System Data" on a Mac Actually Is
macOS reports a large opaque "System Data" category and offers no way to open it. Here is what is inside, and which parts are safe to clear.
