BackupLoupe is a utility that analyzes Time Machine backups. It's also a search system for finding files within your backups. BackupLoupe is a great tool for determining which files are being backed up each time Time Machine runs, or for that matter, why Time Machine takes so long to finish a backup.

BackupLoupe
One of BackupLoupe's best features is its simplest. It can display statistics about your backups, showing you how many Time Machine snapshots have occurred, how many days, weeks, or months you have until your Time Machine drive fills up, and the average size of a snapshot.
This is all useful information. For instance, you may notice that the average snapshot size is quite large when it should be relatively small. Knowing this, you can use BackupLoupe to find out what files are actually being backed up. You may discover that Time Machine is always backing up a file you don't need, such as a large Photoshop temporary file or a virtual machine file from Parallels or Fusion.
With BackupLoupe, you can delete these unnecessary files from your backups and get back a bit of performance as well as backup speed.
BackupLoupe is $5.00. A demo is available.
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