Time Machine - why does it run so often??

[X1Lightning]

I just got my new Imac about a week ago, and got time machine setup with a 1.5tb external drive. i only have 80 gb used on my primary drive, and in a week TM has eaten 500gb of my external, the thing does several backups a day and each is around 10-16gb.

why does it back up some much stuff all the time? shouldn't it only be backing up files that change? seems like a major waste of space to have 100 copies of the exact same file.....

 

[Hellhammer]

Partition your external and give it like 500GB max so it won't eat the whole HD. It deletes the old backups when it has filled the partition

 

[Sky Blue]

It runs every hour and backs up any files that have changed. Do you use VMWare Fusion or Parallels?

 

[GGJstudios]

Set the Time Machine backup interval

 

[X1Lightning]

It runs every hour and backs up any files that have changed. Do you use VMWare Fusion or Parallels?

I am using fusion, is that why the back up is so big?

 

[r.j.s]

I am using fusion, is that why the back up is so big?

Yes, every time you change anything in Fusion, it will backup the entire VM.