ADATA is NOT on my list of recommended SSD's. Don't mess around and spend just a little extra to ensure quality.
Recommend list:
- Samsung 830 or 840
- OCZ Vertex 4
- Intel 320 or newer
- (possibly Crucial M4)
My advice is shop around and get one of these. I usually recommend a 120GB SSD for Windows + applications as well as a HARD DRIVE for everything else (Games, Downloads, Pictures, Videos, Backup of C-Drive).
While 256GB might seem enough and maybe it's an ideal size for you, either way you should get a Hard Drive and use a backup tool and maker periodic images of your C-drive in case of drive failure or virus infection that can't be fixed. The free version of Acronis True Image can be used with Western Digital or Seagate drives detected (even USB). A good choice is the WD 2TB GREEN drive, though you may already have a drive.
IMAGING TIPS:
1) Make a backup IMAGE and keep this one always
2) Make a monthly IMAGE then delete the older one to save space
3) Consider the full version of Acronis True Image 2013 which can automate this procedure ($50 or less on sale)
CLONING:
If you already have a hard drive you can buy an SSD and simply CLONE to it. Ask if you need more information.