Hi Peter,

Time Tracker  is free;  it is pretty basic but usually works well.  It only 
shows backups on the current backup destination, though, so if you've got more 
than one, you have to select the one you want (if you're using "rotating 
backups," it's the set most recently backed-up to).
Time Tracker works by comparing a completed backup you select to the one before 
it. 
 
So if you select a large backup, it’s going to take a while to determine, 
calculate, and display the items.  
If your backups are on a network, connect via Ethernet if possible.  
It will still take a while, but be 2-3 times faster than WI-FI.

That also means that, after 24 hours, you're not really looking at what was 
backed-up on a particular backup, but all the backups since the previous one.

And you can’t select the oldest backup, since there’s nothing to compare it to, 
or one that’s running, failed, or was cancelled.

The Time Tracker display is similar to a Finder window in "List View"
The dated backups will show 0 bytes until you select one, then the app will 
calculate the size, so may take a while.  
You can click the disclosure triangles to see the items in that folder that 
were backed-up. 
 
Time Tracker will only show backups on the volume currently selected for 
backups (or most recently backed-up to) in Time Machine preferences.

The recent version of Time Tracker may give you a permissions error on network 
backups;  if it does, try double-clicking the sparse bundle via the Finder to 
mount the disk image.

Cheers,
Ronni

On 7 Sep 2014, at 5:36 pm, Peter Crisp <[email protected]> wrote:

> Hi, I have a MacBook Pro Retina 13" 256GB with a 2TB attached external drive 
> (currently with around 550GB on the external drive). I have the external 
> drive INCLUDED in my TC backups and the backup size (according to the TM 
> Options panel) is 659GB. It has been backed up for many months now and 
> routinely has been doing the updates hourly per the normal schedule. The 
> backup drive is 1TB attached via the USB with a powered hub to the 3TB TC.
> 
> I know some might think having only 1TB is small for a machine capable of 
> being around 2.25TB (on board Mac Pro drive + the 2TB external) but for the 
> moment the held memory is well inside the 1TB limit.
> 
> Last night i took a video with my iPhone and then imported it to the MacBook 
> Pro to iPhoto. The video file was ~330MB only 2 minutes worth.
> 
> Last night I also tried to push the video file up to my Dropbox and it said 
> around 1 hour to complete which was fine so I just let it go. This morning 
> when I woke up the Macbook, it still hadn't completed and it said it had 10 
> minutes remaining. Then I noticed it commencing a routine backup and I often 
> check the size of the backups just to keep a mental track of data backup 
> size. The Backup is 174.92GB (yes GB)!!
> 
> I was very surprised to see this as normal backups are in the order of ~50MB 
> or maybe 1 or 2GB if I have imported some photos but I have never had a 
> routine backup this size. 
> 
> Is there a way that I can interrogate what files are being backed up so I can 
> see what has caused this? It will significantly reduce the freeboard I had to 
> the 1TB for what appears to be for a meaningless reason. Maybe it was the 
> Dropbox activity that's caused this.
> 
> Regards
> 
> 
> Pete
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