Haven’t tested with 4.26 but works perfect for 4.27.2.
Although I haven’t mentioned this in the post, but you might not want to have anything higher than version 8.0 installed for ‘Android SDK Command line Tools’ since it was recently causing problems for me in Unreal Engine 5. This might not cause any issues on UE4 but just in case.
Sorry, I don’t quite understand what you mean by ‘files/storage permissions’. Are you talking about the 'MANAGE_EXTERNAL_STORAGE' manifest permission that is often required to deploy directly on android device without issues ? Then yes, this shouldn’t make any difference. Just try.