If you have an Android, you know that Google Files doesn't allow you to import packs and other .mc__ to Minecraft. I will help show you how!

Step 1: Download the app called "File Manager" by "File Manager Plus" (this is just the app I use, you might have another app you like)

Step 2: Go to the downloads folder (you may need to sync your files)

Step 3: Click your file of choice and choose to open with Minecraft (has to have an .mcpack or other .mc indicator)

Step 4: After your pack is imported, go to settings, global resource packs, and add to "Active" (or just keep it in "My packs" for future use)

Step 5: Enjoy and play!