.@@@ File Extension

MS-DOS 2.0 to 3.2x Backup Control File

Developer Microsoft
2.3  |  3 Votes

What is a @@@ file?

A file with a .@@@ extension is a backup control file created by the BACKUP program included with MS-DOS and FreeDOS. It contains data used to load a DOS backup, including the backup disk's sequence number and the date on which the backup was created.

More Information

MS-DOS 2.0 to 3.2x created backup disks that contained a copy of each backed-up file and a BACKUPID.@@@ file. The file identified the disk as an MS-DOS backup disk.

FreeDOS, an open-source operating system that emulates MS-DOS on modern PCs and mobile devices, can also create backups that contain BACKUPID.@@@ files. To do so, use the FreeDOS /v (version) switch to choose the 3.2x and earlier backup format.

Common @@@ Filenames

BACKUPID.@@@ - a file created by MS-DOS or FreeDOS that identifies a disk as a backup disk

How to open a @@@ file

You can use FreeDOS's RESTORE program to restore an MS-DOS backup disk that contains a @@@ file.

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Programs that open or reference @@@ files


Verified by FileInfo.com

The FileInfo.com team has independently researched the MS-DOS 2.0 to 3.2x Backup Control file format and Windows apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

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