The Four Best Ways to Open BACKUP Files

The first way you should always try to open file extension BACKUP is to double-click it, but when that doesn’t work, there are a few other things you can try. There are lots of programs that can open different file extensions, and there are some simple ways you can tell which one to use.

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Pick the Right Program

Start by choosing the right program to open your BACKUP file. A few of the most common programs used to open BACKUP files are listed below. One of them should be able to open your BACKUP file.

  • Unknown Apple II File
  • Ad-Aware Reference File
  • pgAdmin Database Backup
  • ISAPI Loader Backup of Current ISAPI Application

Note the File Type

Other programs may be able to open your BACKUP file, depending on the type of file it is. You can find the file type listed in the file’s properties. On a Windows PC, right-click the file, click "Properties", then look under “Type of File.” On a Mac computer, right-click the file, click “More Info,” then look under “Kind”.

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Tip: If it’s the BACKUP file extension, it probably falls under the Uncommon Files type, so any program used for Uncommon Files should open your BACKUP file.

Ask the Developer

Contacting the software developer is another easy way to get help opening a BACKUP file. You can find the developers for the most common programs used to open BACKUP files in the list below.

Software Developer
Unknown Apple II File found on Golden Orchard Apple II CD Rom
Ad-Aware Reference File Lavasoft
pgAdmin Database Backup pgAdmin Project
ISAPI Loader Backup of Current ISAPI Application EGGcentric

Use a Universal File Viewer

When all else fails, a universal file viewer is the best way to open a BACKUP file. Programs like File Magic (Download) can open many different types of files, depending on the format. Although, some files may not be compatible with these programs. If your BACKUP file isn’t compatible, it will only open in binary format.


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1File types that are unsupported can be opened in binary format.

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