When importing photos taken from my Samsung Galaxy S6 into Windows 10, sometimes I get anomalous photos imported that are not in my camera's galaxy.
The anomalous imported images vary in their contents: sometimes they are 1px*1px white image files of a few kb size; sometimes they are graphics like an arrow direction sign, a generic scene of a camera displayed over a cityscape like an ad, or an octagon; sometimes they are files that seem like images but don't open correctly; sometimes they are screenshots of my phone homescreen but they are not screenshots that appear in my phone gallery as when I intentionally take a screenshot. In my last test case, my import included 6 files named "tmp0", "tmp1" ... "tmp5" all .RAW format and somewhat large (one is 8MB, one is 15MB). These files sometimes have almost no metadata, and in some cases they have timestamps that happened when the phone was off and I was asleep! So far I've noticed they all have File Attributes="A" under Properties > Details > File, but I'm not sure what that means.
Here are some specs on the import:
Samsung Galaxy S6 running Android v7.0
Windows 10 HP laptop
To import, I connect phone to PC via USB then Windows Photos pops up. It searches for new images, I then select which of the new ones I want to import and have options on what system to name & save them through and if deleting after importing, then I start the process. It's at that point - where Windows Photos is suggesting what images to import - that I see these weird images which aren't showing up on my phone's gallery.
I use the same import system to import photos from a different camera which connects to the PC via an SD card. When going off the SD card, I never get these weird images, so this seems specific to the Android/Windows connection.
Here's a screenshot of the weird photos I get when importing images from my phone, which are not in my phone's gallery: