I can't find the /system/media/ folder in any root browser or TWRP File Manager I was recently thinking about getting a custom boot animation for my phone, so I installed a root browser and looked for /system/media/ but it wasn't there! I also tried the file manager built into TWRP, but I couldn't find it there either. When I tried to use the "Boot Animations for Superuser" app, it ran into an error trying to backup the existing boot animation. If the /system/media/ folder is missing, how am I still getting the default boot animation that comes with Evolution X? Anyways, I just need help on how to replace the boot animation.

I'm running Evolution X 4.3 (official) for zerofltexx (Samsung Galaxy S6) with MagiskRoot and a few Magisk Modules.
You should read the detail text of the Boot Animations for Superuser app. There you can find the following info:


  Q: Is my device supported? A: Your device must be rooted to install a
  boot animation. Some manufacturers, like Samsung, use a different boot
  animation format (QMG) which is not compatible with this app. 


Therefore the app does not work for Samsung devices. You need an app that is specialized to Samsung devices or that supports the QMG format.

And keep in mind the next section:


  Q: The boot animation doesn’t play. How can I fix this? A: Some
  Android devices use different install locations. You should find your
  current boot animation location and change it in the app’s
  preferences.


This explains why /system/media/ does not exist. Again Samsung seems to follows a different path that most of the other Android devices.