Why is my Intel 80gb SSD so full?

OK
I own 2 Intel 80gb SSD hardrives they are saying they are full but I backed up all my files to another drive. so theres no way it should think theres only 10 gb available. please help what all system info do you need to understand my problem?

Post your my computer -> C: drive properties.

Post My Computer -> Properties -> System Protection -> (select C drive) -> Configure

Post My Computer -> Properties -> Advanced System Settings -> Advanced -> Performance Settings -> Advanced -> Virtual Memory -> Change

Post the size of your Program files and Program file (x86) directories

Do you have hibernation enabled?

Fill out your systems specs, e.g. how much memory you have and other computer info.

Windows 7 Ultimate 64 bit Service Pack 1
8gb ram
Intel Core i5-2400 CPU @ 3.10 GHz
Geforce 275
MSi motherbord
Virtual memory set to automatic 8173 mb
no system restore its not turned on
no hibernate
Program files folder is 1.9 gb
Program files (x86) is 20.7 gb
All there is as far as I know in C is the os I dont understand why these SSD's think they are so full how do I check to see if there are hidden files in the directory?

When you say you backed up your files I presume you made a copy ie Windows backup. While this is good as it will allow you to restore you PC in case something goes wrong, it is not going to remove data from your drives. What you can do is cut and paste your personal files to another drive so they are still accessible, Ie from your E:\ drive. (films music pictures etc.) You need to be careful not to move system files as they may no longer work
To clean up your C:\ drive, right click on the drive and select Properties and disc cleanup

If you want to know WHAT is taking up the disk space, use this little prgram. It's great at finding unknown file space hogs...

WinDirStat - Windows Directory Statistics

Apart from checking with the excellent program that fseal posted, you must also check your shadowstorage because that would not show up in the WinDirStat charts.

Open an elevated Command Prompt and type or paste

vssadmin list shadowstorage

Then hit Enter. Look for the C and E numbers. Allocated is what is currently used. Maximum is what will be ultimately used.

If those numbers are anything bigger than 5 to 10GBs, we'll have to reduce the shadowstorage. Post back and we will tell you how.

Wow that program is awesome I love it. and the elevated command prompt of shadowstorage showed 1% shadowstorage but thanks for both. i can see that my zbrush 4 projects and tools are whats clogging everything up I think that made it prety clear to me. THANKS