Hmmm I'm sorry I'm new to mac, i just want to have backup, does my Time Machine do the trick maybe?
just don't want to loose my pictures if something would happened to my computer.
and sometimes get the photos to a external hard drive thats not in my home.
Lots of posts here. But really this is not hard. First off "YES" use Time machine. It should be your first line of defense.
Then also in addition find a way to get the dat off-site. Either copy to hard drives that you ROTATE to a far away location or get an on-line backup service like Crashplan or Backblaze.
One problem is making an exact "clone" of your data is this senario: (1) You accidentally, without knowing it delete a file. Not problem because you used "CCC" just a few hours ago and have a backup. (2) next you run CCC and create a new backup and over write your only good copy of the file.
A better way to make backups is to do "incremental" backups. these never over write old data and copy only the changes you made to the backup. All old versions of the data are kept, at least until you have run out of space. The down side is that you need a very large backup disk.
Senario #2 is this: On Monday you make a backup, on tuesday the software, un-known to you corrupts a file, on Wednesday you make a backup saving the corrupted file over top of the good one.
Programs like CCC as attractive because conceptually they are easy to understand, you "clone" your working disk. What could be more simple? Yes it is easy to understand but it destroys older data and replaces it with new data which defeats the purpose of a backup. You need to hang on to that old data.
CCC can do this but you need a LOT of disk drives used in rotation.
Time machine is incremental as are most cloud backup services. You can use CCC if you understand it over writes data and yu may have to pull a file off another backup.
In summary you need three copies of the data at all times (even while a backup is in progress, so you might need four.) and the data much always be in two geographic locations (even while a backup is in progress, so you need to rotate the off-site disks)