There’s a lot of ways that could be done. Easiest is if you have a microSD card that’s fat32 formatted (up to 32 GB), this should be accessible from both Windows and Android. Other options is to use a usb stick (these are normally less than 32 GB and also fat32) and can be mounted in both Windows and Android. Another way would be to copy the files to a Desktop Windows PC via an external drive and boot the tablet into Android and connect with usb cable and use mtp storage to transfer files. You may need to enable mtp storage under settings –> storage.