Explain sandbox to an old timer

[Greg14]

I am 64 years old and I sometimes get frustrated with the new language
of the computer age.

I think i understand sandbox BUT could you pretend to be 64 and / or
explain it to me as a 6th grader !!!

Also I partitioned my WD pro in two sections would and of the options that
the upgraded version i bought require a another partition ??
I need the two for B/U and separate iTunes and iPhoto libraries.

Sorry to trouble you but I never like to assume

Greg

[dnanian]

In general, if you're not the kind of person who "jumps" on updates, you don't need the Sandbox. I don't know how to explain it better than I did in the User's Guide, though...

If you want to back up two partitions, you should partition your destination drive into two partitions as well, one for each source...