bitflipper
Sharkbite, please learn from my mistake...for years I backed up projects as insurance against what I thought were the most probable disaster scenarios: disk failure and user-error. When disaster really did strike, though, it wasn't either of those things but something unexpected: theft. The thieves took 12 years of projects and their backups.
 
It could have been fire or a lightning strike, too, with the same result. 
 
The only way to guard against all threats is a removable drive that you routinely disconnect and stash somewhere away from the computer. If your studio is in the garage, keep the backups in the house. If your studio is in the house, keep them in the garage. If neither is an option, use the glove box in your car as your offsite storage facility.
 
While an extra internal drive offers speed and convenience (handy if you back up frequently), I would urge you to consider an external drive (or high-capacity USB stick) as the ultimate fallback. There's no reason you can't have both.

Excellent point, I do have other back ups both on line (IDrive) and I keep a back up at my brothers house. I can't imagine having my recording stolen. That has to be the worst feeling in the world.

It's still unclear, at least to me , if he wants this drive to be his main audio drive or for backing them up.
 
2 completely different scenarios with different recommendations.

Bristol_Jonesey
It's still unclear, at least to me , if he wants this drive to be his main audio drive or for backing them up.
 
2 completely different scenarios with different recommendations.

The question should of been, "How do I not bog down my computer with just using a C drive?" or "How do I add a secondary internal drive and how should I set it up?".

I think I do what a lot of people do. 
 
240 SSD  C drive OS and programs
1 TB 7200 drive for all projects, masters, all things music for my last 30 years ( 60% cap) 
1 TB 7200 drive for content and samples and back up of current working projects. 
 
dozens of my old HD sitting in a box have every OS and data drive since 2000. 
2 new 2 TB external drives with full back ups all our computers. 
300 miles from here, stuff backed up on in laws computer
And most of our family photos are spread between 5 households and the cloud. 

Cactus Music
I think I do what a lot of people do. 
 
240 SSD  C drive OS and programs
1 TB 7200 drive for all projects, masters, all things music for my last 30 years ( 60% cap) 
1 TB 7200 drive for content and samples and back up of current working projects. 
 
dozens of my old HD sitting in a box have every OS and data drive since 2000. 
2 new 2 TB external drives with full back ups all our computers. 
300 miles from here, stuff backed up on in laws computer
And most of our family photos are spread between 5 households and the cloud. 

Exactly how  mine are set up.

Cactus Music
I think I do what a lot of people do. 
 
240 SSD  C drive OS and programs
1 TB 7200 drive for all projects, masters, all things music for my last 30 years ( 60% cap) 
1 TB 7200 drive for content and samples and back up of current working projects. 
 
dozens of my old HD sitting in a box have every OS and data drive since 2000. 
2 new 2 TB external drives with full back ups all our computers. 
300 miles from here, stuff backed up on in laws computer
And most of our family photos are spread between 5 households and the cloud. 

That is EXACTLY what I was wanting to know. Many thanks.

I've never had a problem running projects from a data drive. Been using that system for 12 years or more.
I like data drives because you can easily back the whole shebang up with simple drag and drop to anywhere. 
Then when you upgrade your computer it's as simple as moving the data drive, or a clone of it, to the new machine and everything is right there. I have never lost one tiny bit of a project this way. 
I date all my back up folders to keep track of which versions they might contain. 
I replace my data drives at least every 3-5 years and at this point I've never had a drive fail. 
I just keep upgrading and put the old ones in a shoe box. I have a 5 GB drive from my first PC and I think it still will spin up. I have a few old USB 1.0 drive enclosers that use the old ID cables. 

Johnny V, I am going to do that set up. I just ordered a hard drive and a shoe box. I have a gizmo here that allows you to hook up a hard drive to your computer to access it and it has an old ID cable coming off of it. I need to also add what versions are on my drives, that is a great tip. Many thanks my friend.

I've always built and bought systems with internal storage drives or internal removable drives (these usually fail as external drives over time). But now with USB3 and Thunderbolt, external drives are a viable alternative worth considering.
 
Mine are set up using separate partitions as 1TB is a huge room for the OS to go looking for things.

Bit has a good point, always back up to disk.
I do this once a month. it takes for ever to do but it is well worth it.
I have a large water proof case I keep all my disks in to protect them from the elements.
There was a time I used to smoke in my studio and my back up disks(after a few years) even though were in sleeves,
were covered in nicotine. I had to clean each one just so they would be playable.
so learn 2 lessons here. back to disk, don't smoke in your studio.