From the Android Homepage with the Maxi sys App closed try an unused brand new Sandisk 32gb USB flash drive.(I didn't have any luck trying a used formatted USB thumb drive of another brand) In ES Explorer copy and paste Scan Folder to USB Flash drive. Make sure your  tablet is plugged into it's charger  with a good charge on it's battery to start with.

Make sure you allow several hours for the process. I used the USB SS port of my MaxiSys Elite with a USB3 thumbdrive and it still took a couple hours or more. Due to these tablets not having an internal cooling fans I actually wrapped a large plastic  Block of Blue Ice with a thick dry plush breathable cotton towel around it and layed my Maxi Sys on it hoping to keep things running cooler inside.