Hi Hoeknyl,
Easy method: I previously removed Android on my x80 leaving only Windows 10 – Windows Disk management > delete all other partitions for Android and create a Windows partition for data storage. Leaves your existing Windows partition intact with all the software.
You can also use Windows 10’s Storage move option > search for “Storage” and use the Save location to move your documents, desktop, picture etc to the extra partition to make more space in the Windows partition.
Sorry but I didn’t do this yet on my Tbook 16 but it works on my x80.