Mac and Backup newbie, sizing sandbox and sparce image

[kswaty]

Thank You Dave - It sounds like if I make my Sandbox partition about 40 to 50 gb, I will have plenty of room to include applications if I want - although I like your tip about putting new installations on the desktop - in this situation, you would install the new app while in the Sandbox, put it on the desktop to share with the original, then when you're happy with it, move it to the applcation folder [do you reinstall it in the original or copy it].

About sparce image - if I was going to create a partition to store one, I was just wondering if the partition would have to be gb per gb, exactly the same size as the original. My husband say that in the PC world that is called Ghosting, and that the Ghost disk image is much smaller than the original.