64 GiG SanDisk USB Flash Drive Cant Recover The Partition I have made

I have a 64 gig SanDisk USB flash drive and a Windows 10 operating system. About a month ago I partitioned into 2-32gig partitions. Now I want to restore it to its original 64 gig capacity for a recovery disk. I use a program called DiskGenius to do this, and indeed when I restore the partition it shows it has 57 gig.
When I open Windows Explorer I see that it has 57 gig, so I begin the recovery disk. After a couple of days I get a message that I am out of space and I notice that the disk only has a capacity of 32 gig. I go back to DiskGenius to look at the capacity on the right-hand side of the program's screen and says it only has 32 gig, however, the capacity on the left side shows a total of 57 gig.
I have tried this 3 times and get the same result. I expect I am doing something wrong when I use the DiskGenius program and don't know what this is. HELP?

Thanks

Kyhi said:

Open Command Prompt (Admin) and type
Diskpart
List Disk
Select Disk # ( # being the USB Disk Number)
Clean
Create Partition Primary
format quick fs=ntfs
Exit

Note: The Recovery Disk you made - recreated the 32GB Fat32 Partiton........

Thanks, I have tried Diskpart. It formats the 32gig partition. I want to recover the full 64gig

Brentg said:

Thanks, I have tried Diskpart. It formats the 32gig partition. I want to recover the full 64gig

You could format all 64GB if you used ExFat or ntfs, but if you want Fat32 then here are a couple of ways from the How-To Geek...

How to Format USB Drives Larger Than 32GB With FAT32 on Windows

Thanks, Kyhi, I'll try it again.

- - - Updated - - -

Kyhi, I once again tried Diskpart and followed your instructions. It did as you said it would do and I could see I had recovered my 64gig partition, both there and in Windows 10. I again ran, "Create A Recovery Disk", and when it was finished I checked the USB drive for space. It reported that I had a 32gig USB drive with X amount of space left after the recovery.
So, I once again use Diskpart, and got the USB back to showing the full 64gig of space in both the Diskpart and Windows 10. This time, instead of running "Create A Recovery Disk", I copied around 1,600 songs to the disk and when it was finished, Diskpart and Windows 10 both showed I was copying to a 64gig USB drive???
Now, I am really baffled! My only thought was, "Does Windows "Create A Recovery Drive", have a limit on the size of the USB drive you use, and reconfigure the partition when you use it. I googled this and didn't find an answer.
HELP?

Kyhi, Thanks! That solves that problem. I can use a smaller USB drive now and put the 64gig to better use!