https://www.amazon.com/dp/B01EHG3GVM/ref=cm_sw_r_other_apa_i_WyweCbP3PTDPN
This is what I'm going to try, myself. It's a 256gb thumb drive. Only $43, so not too bad. I hear SanDisk is the way to go when it comes to the PS Classic. I have an 8 gig SanDisk that works pretty great so far.
I hope they make it where you can use the power port in the back like the classic, that would be awesome.
Just be cautious of which Thumb Drive you use if you go that route. Tons of users have had issues with specific thumb drives. This is the one I use and recommended to friends / people, that wont have that issue, with no problems. In addition, the DVR you attach to the AIRTV2 will only work for the Broadcast channels, the Sling DVR can be used for all sling channels. The DVR will integrate into your sling app, so will the channels added integrate into the sling guide, so you will be able to see the future shows in your guide, which is nice.
https://www.amazon.com/gp/product/B01EHG3GVM/ref=ppx\_yo\_dt\_b\_search\_asin\_title?ie=UTF8&psc=1