We just deleted all the the hidden resource files MacOS puts on an external volume when it’s non-native format.
Open Terminal
MAKE SURE you are in the SD card root level in the command window before running the command below. To do so, type “cd” (without quotes), then leave a space, then drag the SDcard icon from the Desktop into the Terminal window to auto-complete the path, and hit return.
Type “ls -al” to get a list of all the files and font folders on the SD and to confirm you’re in the right directory. You should see a bunch of “duplicates” but the name starts with a dot.
sudo find . -type f -name '.*' -delete
hit return, then do ls -al again to confirm hidden files are gone.
All that said, I have no idea why this would affect performance, but it seems it does based on videos of before and after.
Before was like Waaaaaaay crazy lagged. upward of 3-4 seconds.