Though DAT files, which house data as the shortened name implies, are usually best left alone, here's how you can open them.

How to launch a specific Microsoft 365 file at startup Windows can also open a file at startup, if you put a shortcut link to it in the Windows startup folder. To create the shortcut, do the ...

If you're having trouble opening a DAT file, I'll show you a simple and free way to do it. This method works on both Mac and PC. Just open your browser and go to winmaildat.com. It's a ...