I have done this on my Vi10 Plus 32GB model|
It allocates about 8GB for Android and around 17GB for Windows. After installing Windows there is about 4 GB of free space
I am not sure what exactly is happening with some of the installation process ... if you look at Disk Management in Windows you can see 14 partitions it has created on this 32GB storage card. (This is not an exaggeration -- there are 14). 2 different EFI partitions at 100MB each, a 1GB recovery partition (looks like maybe for Windows?), a 2.5GB partition in front of the 8GB partition for Android (is this also used for recovery? I have no idea) and a slew f various partitions at 30 MB, 1 MB, 16 MB, 8 MB, etc.
Wonder if there is a purpose specifically for the 2.50GB partition or if this can be reclaimed somehow or not?
Regardless it is not a huge issue for me. I have around 7GB free in Android plus a 128GB MicroSD card that can be used in both Android and Windows to store anything I need. The write speed seems pretty equal with internal storage and the MicroSD card so it is not a big difference, and I don't play a lot of games or anything where I really need the internal storage free
One thing I will say is that Android on this tablet seems much better than when I was using Remix 2. I saw a lot of lockups and various other software glitches with Remix 2 but the experience with pure Android is completely different and significantly better