David why are there three System Reserved partitions marked Active - do you have three different operating systems on the PC? I dont' think so because H data partition is on one of these drives which have bootable live WIndows boot partitions marked Active which means the BIOS is being told they are standing by to boot WIndows, and all are queried each time you start the PC.
The most basic thing we need to do when we remove an operating system is to wipe the drive of bootable code and old boot partitions so they don't interfere.
For now power off to unplug the data cable from Disks 1 and 2, then power on to test that the System Reserved on Disk 0 is the one which is booting C. It should be, but we dont' take things for granted when the disk configuration is this whacked.
If so then plug them back in and mark D and E Inactive following this guide:
http://www.sevenforums.com/tutorials/197157-par...
Now delete D & E in Disk management. If it wont' do the job then follow this guide:
https://techjourney.net/delete-and-remove-prote...
Once these are deleted run a Disk Check on all drives:
https://www.groovypost.com/howto/check-hard-dri...
Then see if you can copy files to H. If not do you have a drive you can back up the files from H onto to properly clean and reformat the drive as should have been done when it was changed from a WIndows drive? Does H still have WIndows files on it?
If you can back up the files, then confirm they all got copied, which is easiest by comparing the size in the H Properties box (right click H > Properties) with the destination drive Properties box placed side by side. Do not proceed until you are positive every file from H has been transferred.
Then wipe and reformat the drive as shown here: