FYI I just popped in this one and it's fine. I set it up to be used as internal storage, and previously it was working, full capacity, as a regular external SD card.
Ordered this guy just now, hopefully have better luck tomorrow when it arrives!
https://www.amazon.com/gp/product/B010Q57S62/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
And here's the link to the 2nd one, which has only corrupted once. After reformatting it, it seems to be fine. I currently have almost 10gb of "stuff" on it and no problems yet: https://www.amazon.com/dp/B010Q57S62/ref=cm_sw_r_cp_apa_z4LLxbJZMA1N3
Could it be the MicroSD issue? What class is it? MicroSD now is cheap and I would get one with a better class mostly for the apps to move smoothly without any major issue.
For me, I use the SanDisk Ultra 128GB microSDXC UHS-I on my Shield Tablet LTE https://www.amazon.com/SanDisk-microSDXC-Standard-Packaging-SDSQUNC-128G-GN6MA/dp/B010Q57S62/ref=sr_1_1?ie=UTF8&qid=1487263794&sr=8-1&keywords=sandisk+128gb+microsd
For the most part, all my apps and video and games work fine without any hiccup on my tablet. I don't know if it will fix your issue but would at least get another MicroSD and maybe see if the issue you're having is maybe the MicroSD or maybe something even bigger issue with your K1.
Wrong, the Evo has half the transfer speed of http://www.amazon.com/gp/product/B010Q57S62 while costing like 20 bucks more.
Just took your advice and ordered this guy, i'll have it tomorrow via prime, thanks for the help!
https://www.amazon.com/gp/product/B010Q57S62/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
Cool, that's what I'm going to do.
Amazon has a Sandisk 128 for $40.
I was also looking at this Silicon Power (never heard of them) and the reviews are pretty good but I will spend a little more for the piece of mind of a brand name
Been using this one from Sandisk. Working just fine since the day I first purchased it to use in my Galaxy S7 Edge back in March 2016.