How to format a flash drive to fat32
I would suggest you to try this tool -- Paragon exFAT, NTFS &amp; HFS+ . It is available as .apk files on the net or you can download from Google play as well.

But i would seriously suggest waiting it out and doing formatting throiugh tried and tested methods via PC (just to negate any slight chances of renedering your drive useless which does happen when making file system changes using smartphones)

here are the links

https://play.google.com/store/apps/details?id=com.paragon.mounter