Learn How easy it is to Format (set-up) your external harddrive to start backuping your mac:
Open Disk Utility.( Look inside your Applications folder- is a folder called ‘Utilities’ – look inside to find Disk Utility app)
The disk utility window looks like this:
with your external drive selected- click the “Partition” tab, now select the “Volume Scheme” to “1 Partition.”**
Click “Options” and select “GUID Partition Table” (for Intel-based Macs) or “Apple Partition Map” (for PowerPCs).
Name the drive (i use LapBackup-so i know what it is:my laptop backup)
then set the format to “Mac OS Extended (Journaled).”
Apply the changes and confirm the actions.
NOW BACK THAT SH#T UP.
**in-case of a large external drive- -i have a 1 tera byte drive,which i use , with two partitions-one for back-uping my desktop and one for laptop – i set up two partitions- each 500 gb-
if you do choose more than one partition- just select one of the newly created partitions (essentially -each “partition” is it’s own hard-drive)
and format it as explained above-to use as your backup drive-