How can I find and delete duplicates. 500g used on 1t hard drive, 80gs left on external hard drive used with Time machine. I want to transfer ext. drive to new computer but it will eat up the new hard drive. I need to delete duplicates. Thanks.
MacBook Pro, OS X Yosemite (10.10.5)
Thank you all, and point well taken about where to post, Scott.
Thanks, Scott, I think I understand it now. This has been very useful. I appreciate everybody's help.
First of all, I only use the back up drive for my TM backups so no need to partition.
I have a number of computers, three under discussion here. A 10 yo old iMac is on its way out but with important files and software and I replaced it with a new macbook pro, plus another macbook pro that is my everyday computer. It does not have the same files, etc. as the iMac and it has worked for me to use both. I use the 24 inch screen for photo work for example. Sad to give that up but time marches on.
So it is the back up drive for the iMac to the new Macbook pro I'm dealing with. The other Macbook has its own back up drive and is fine.
My back up drive has more data than my computer
