My C partition has got a low disk space message and is needed to be increased. So, after checking my drive space, I decode to add some free space from F partition to my C partition. But, I don’t know what to do! Do you know how to do? I am using Windows 7. Please, tell me the ways in details! Thanks a lot!

Or you can delete some unused files that you have been collecting... which is true for almost everyone with a computer.

Or if you do not wish to delete the files, either cut and paste them to F or copy first to F then delete from C (movies music photos etc.). You can also go through your Programs and Features in the Control Panel and see if there are any programs you don't use and remove them. Games can take up a lot of room if you have a few, install them to the F drive instead. Finally there is the option of purchasing a larger drive to take C's place and cloning C to the new drive.

If you're wanting to partition space from the F: drive to the C: drive, and both drives are on the same disk you can use a program such as EaseUS Partition Master to allocate free space from F: to C:. You can install the program to F: drive so as to not take up anymore space on C:.

EaseUS Partition Master Free Edition - Free download and software reviews - CNET Download.com

Ok! In your case, since the free space from F partition is not adjacent to C partition, the “extend” option in Disk Management often cannot be used. So, this way may not be the solution for you.
In this moment, you need to take chances with some partition resizing tools. There are many similar programs online. Just search one over the internet.
One more thing, remember to make data backups well in advance.
Read more detailed information here:
Partition-magic-server-2003.blogspot.com/2013/11/resize-server-2003-partition-free.html