Removing a partition on a flash drive?

[gizmo1990]

I have an old 64gb usb3 flash drive which I can't seem to delete the partitions from and make one clean whole partition. Disk manager and diskpart have both failed to delete it. I keep getting told this,

the operation is not supported on a non-empty removable disk

I'm sure I remember some kind of 'official' program which would do this with troublesome partitions? Does anyone know what it is and where I can find it?

Any advice greatly appreciated.

 

[gizmo1990]

Thanks for the replies guys. I tried the transcend tool which didn't work unfortuantely. However a tip on the superuser forum did. It looks like running diskpart as admin is important. So too is listing the disk and the clean command. That fixed it and enabled me to format the entire drive via disk manager.