Apparently I have done the impossible
On my android device, I have an ArcGIS_Collector folder on the internal storage and on the "actual" MicroSD card.
Take your TPK's and place it into the ArcGIS_Collector on the SD card. Below you see my SD card from within Windows explorer.
After you use Collector those tpks disappear and are extracted into the basemaps folder by collector.
And below you can see I have the Arc_Collector Folder on the internal and external card.
Turn phone off, then put the microSD card in. Turn phone on, open collector. Choose map to download. Now look at my options for basemaps that show up on my device.
The TPK's were moved to the basemaps folder on the EXTERNAL micro sd card, not the internal phone storage.