Is there some free space that is exactly adjacent to your C drive?
If there is, you can directly try to increase your partition size in Disk Management: Right click your C drive in Disk Management and select “extend volume” option to do it.
But, if that cannot work on your computer, you can directly take chances with some partition resizing tools like GParted, IM-Magic Partition Resizer Free and Paragon Partition Master and more.
PS: Always back up your drive data well before the resizing process in case of any data loss.
Thank you for this useful post!
I have learned a lot and tried to extend the partition space of my friend with the guidance of this video tutorial: https://www.youtube.com/watch?v=6jCeT7CbsKk
Moreover, I also have learned the making data backup of all related partitions is also important in case of any data loss.
Thank you very much!!!