Originally Posted by JJ-KwiK
Use adb to push the OBB file into that location, or use an apk like 3cx droiddesktop to either ftp or web ftp the files and folder to the proper location.
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I found that pushing to the /Android/obb folder runs with no errors but doesn't actually write the files. So you can push to the /download folder, then use a file manager and move it to the obb folder/ I think it is /mnt/storage/legacy/download. Not in front of the firetv to doublecheck.