I also (belatedly) figured out why I couldn’t use my USB to go cable and my USB card reader and the SD card from my Sony (San Disk SDXC), attaching it to my Note3 phone or Nexus 7 tablet to ftp the photos back to my server to back them up. The SD card in the A6000 is a 64 gig card and is formatted in exFat. My Android devices won’t recognize an exFat card. I had no problem doing this with the SD card from my Canon S100, because it is a 32 gig card formatted in FAT32, which was easily recognized by my tablet and phone. So I was able to ftp the photos back to my server from that card, as well as those stored internally on my phone. I used FTP Cafe on my phone to transfer hundreds of photos, just not those on the 64gig card. It seems that unless you are using a rooted device (my Note3 is not), that there’s not a solution for this I could find. I had an app called Nexus Media Importer, but it too would not recognize the exFat formatted SD card. I had no means to reformat the card after I left and the camera apparently formats the card internally as exFat.

It does appear that IOS (under at least version 8) supports this formatting, but at the time, I didn’t have the iPad SD card reader. I need to do a little more investigation on this point before I buy the card reader. I have Transmit on my iPad Air2, so if the OS supports the card file format, I should hopefully be able to use this method to back up my photos, without carrying a laptop.
Any suggestions regarding this are welcome.

I didn’t end up using my fixed focus 50mm Canon lens at all. Partly because I wasn’t often in a setting that made it useful or necessary, but also because to use it, I have to detach the adapter from my Canon 10-22mm lens where it usually stays. Maybe not a lot, but dead weight I didn’t need.

I filtered the ~1400 photos I took down to the approximate 300 that are on Flickr.