Hello everyone! Okay, so here's the situation. I want to make a backup of every single file on my computer. I have a 250 GB SSD with my OS files on it and a 1 TB hard drive where most of my games and stuff go. In practice, my SSD has about 100-120 GBs and my HDD currently has about 400 GBs full, and while the latter might go up to about 500-600 eventually, it's unlikely that it'll be filled up anytime soon. I'm wondering if I can cut costs and get a 1 TB drive for a backup for both drives, or if I have to get a 2 TB one.
So, my questions are:
Is a 1 TB external hard drive enough to make a full backup of both drives as it stands? (Essentially, is a backup bigger or smaller than the total size of the files that are being backed up?)
What kind of backup do I need if I want to be able to restore every single file in case my SSD or HDD fries? (Like - if I get a new SSD or HDD, I should be able to restore everything to it with my backup and the system should then start up with no additional problems and not a single file missing.) It seemed to me like a "system image" is what I need, but I want to make sure I understood things correctly.
Will the 1 TB drive be enough assuming the combined volume of data on my drives doesn't go above 700-800 GB?
Anything else I should know?
(I'm on Windows 7.)