It is therefor recommended to verify the file integrity of backups regularly to make sure that they can still be used to recover data if the need should arise. Nothing’s worse than to realize that the backups are unusable.

File Check MD5 is a small portable software for Windows that has been designed for that specific purpose. It can be used to compute MD5 hashes of all files in a specific root folder including subfolders. All computed MD5 hashes will be stored in a text file in that root folder.

The Check Files option can then be used to check files on the backup storage with the MD5 hashes of the original files to ensure data integrity.

One interesting option of the software program is to test the md5 hashes that have been previously computed if the text file is located in the same folder as the executable. It would then only be a matter of adding the File Check MD5 software and the text file with the MD5 hashes to the root of the backup to be able to automatically verify the file integrity.

The only thing that is missing is the ability to select a different storage location for the MD5 hashes. This would make it possible to run the software on read only devices as well.

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