Any way to increase size of primary partition

Is it possible to increase the size of a primary partition without reformatting and starting over? I would like to not have to reinstall the OS and programs there. When I divided the hard drive, I thought I had left enough room on C: but it is almost full. The D:partition (meant to be for storage and some program installation which shows up as a logical drive) has the space available. I used GParted to 'shrink' D: and now have 20Gig of unallocated space (between C: and D: )to use to increase the size of C:. It will not allow me to put that space onto the C: partition, I assume because it is a primary and the 20 Gig is in the 'logical' portion. I also get a warning symbol and a message that says 'Unable to read contents of file system. Some operations may be unavailable.' Should I have used something other than the defaults when booting GParted?
I also tried using the free version of Partition Manager and didn't have any luck with that (or I didn't know how to get it to work )
Both partitions are FAT32. Would it be of any help to change them to NTFS?
I did the chkdsk both /f and /r which some suggested would fix it. That didn't help.
Thanks for any help.

Hi,
First you have to know - C: partition (Your WINDOWS is probably on it) MUST ALWAYS have 10 Gb free!

NTFS are better for C: partition, so if you know how(you can find a lot of tutorials on Google) to change from FAT32 to NTFS do it. It's much better than FAT32 and faster.

Yes, you can transfer some free space from D: to C: with Partition Magic, it's probably one of the best Partition Manager i ever had. Also, you can find a lot of tutorials on internet how to use it.

And no, you'll not lose your files&folers from D: ONLY if you transfer free space, i mean if you have 10 gb free, don't transfer 15 gb coz you'll lost something.

I was able to increase the size of the C: partition using EASEUS Partition Master Home Edition. It did exactly what I wanted it to do with very little problem since I already had the unallocated area available. It didn't seem to mind that one was a primary partition and the other was logical. I'm going to reboot the machine a few more times to make sure all is well. The programs that I've opened thus far seem to be working correctly.
I will probably go ahead and try to change the file system if it won't affect the programs and files that are already on there.
Thanks

That sounds fine. Hm.. I changed mine from FAT to NTFS with Partition Magic, and i didn't lose anything

It is always safer to back up your data in case anything goes wrong.

Thanks. I have done a backup of most of the C drive. Hope this goes smoothly.

Thanks for the help with this. Was able get the partition increased Just need to install some more memory to help speed things up a little.

Thanks for informing us.