Inserting / removing the fake drive at the right time has been tested successfully on a Samsung A6 and Samsung J3 Pro among other rooted Android mobile devices that are able to emulate USB drives in the Tweets below, and he also notes you can try using DriveDroid or USB Mountr apps as well.
Below are some more Droid-related articles sorted by date with the oldest first for those interested, and from gist.github.com:
Your capture gallery games should populate in the list view on the left side (most games should have their proper name, but it will fallback to title id if not found)
Select a game to view your gallery
TODO
Add support for video
Allow selecting and download images, and mass downloading entire game gallery
Sorting and filtering (for games and gallery assets themselves)
UI cleanup
In the Tweets below, he also adds the following note.. to quote:
"Just my first attempt at messing around with the PS4. Very rudimentary, but I plan on expanding it a bit." How to Find Capture Gallery on PS4
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