step-1 : download termux on android device
step-2 : copy the (example.img,tar,.etc)any extension files to device storage download folder
step-3 : open termux and type ( cd storage/emulated/0/downloads
step-4 : and type tar -c filename >> filename.tar
step-5: md5sum -t filename.tar >> filename.tar
step-6: mv filename.tar filename.tar.md5
step-2 : copy the (example.img,tar,.etc)any extension files to device storage download folder
step-3 : open termux and type ( cd storage/emulated/0/downloads
step-4 : and type tar -c filename >> filename.tar
step-5: md5sum -t filename.tar >> filename.tar
step-6: mv filename.tar filename.tar.md5