Merging folders

Dave_O

macrumors member
Original poster
Nov 16, 2018
48
11
I keep a APFS Encrypted USB disk for data backup. Each month, I copy a folder with multiple subfolders to the USB disk which has the folder from a month ago. With Windows, I got the choice to skip files that exist with the same name, which is what is needed.

I read that if I hold the Option Key when moving a folder to a destination that has a folder with the same name, I will get a Merge option.

I'm on the current MacOS, but I never see this option. Any ideas, or suggestions on a better way to do this kind of backup?
 

CoastalOR

macrumors 68020
Jan 19, 2015
2,458
899
Oregon, USA
The Mac does not do a good job of merging. I know of no way to invoke a secret merge function in macOS. There is ditto in Terminal, but it is not as convenient.

I use ChronoSync ($49.99) to do a File and Folder Synchronization.
 

chown33

Moderator
Staff member
Aug 9, 2009
8,364
4,348
Pumpkindale
Carbon Copy Cloner can keep two folders in sync across disks. See its website.

CCC uses the command-line tool 'rsync' to do this. So one can also read the man page for rsync to see what CCC can do.
 

chabig

macrumors 603
Sep 6, 2002
5,881
3,140
You need a backup tool. CCC is good, so is SuperDuper. They are probably the two most well known apps, and either will do what you want.
 

Dave_O

macrumors member
Original poster
Nov 16, 2018
48
11
Thanks. I have CCC, but did not know it did folder backups. I'll RTFM :)