try this app, it should record Toast Notifications as well, it should show you the source
https://play.google.com/store/apps/details?id=com.evanhe.nhfree&hl=en
You should be able to connect the second SD card via Micro USB using an adapter. Then use a file manager to transfer your data. https://www.amazon.co.uk/dp/B00CJIFJRK/ref=cm_sw_r_cp_apa_A9nCzbWKNVDVS
Are you upgrading all your chargers to Type C as well? If so, you could just use a cable that does the job
They will have to protrude a decent amount, although I honestly have a difficult time finding many cables that "downgrade" USB types from C to B. I did see a couple though. Realistically, there's simply no way to nest the two inside each other, so there has to be space for the ports and the connections. The simplest solution would to keep some micro-b cables handy or just use wireless charging exclusively (my preferred method).
After all, USB-C ubiquity is still a little ways off, so chances are you will need some legacy cables for a little while regardless. If you absolutely have to have the adapters, why not just keep them on the cables and take them off when you need the cable for another purpose?
You'll get as many case suggestions as people here. Here's one more. And in video.