How can I find exactly what files are included in my last Time Machine backup? I find that my Time Machine backup never passes an hour without backing up files, even if I haven't used the Mac.  I've excluded .Trash and Downloads under my user folder.  A typical hourly backup is 60-70MB, and I want to know exactly what files are being backed up here so I can possibly exclude them too.

After backing up, the Indexing of the Backup takes an extremely long time, and I don't know which is the cause and which is the result, or if this is unrelated to my mystery files being backed up.
You could try BackupLoupe: it will give you the size of each backup, the backed-up files and catalog the backups with colors to quickly identify the big ones.



There are also lists of files excluded by rule or that you add manually to exclusions:


On OS X, what files are excluded by rule from a Time Machine backup?