Read/write filesystem support for Android.
While it doesn't offer pure read/write access like you'd expect, this lets you mount things. You can use any other file manager (I use several most notably Total Commander and Ghost Commander), and it prompts to download the file.
Has a free version, but I don't know what the difference between that and the pay version is.
NTFS, exFAT, HFS+, FAT32, extFS
2021-09-22 - 220.127.116.11 on Android 10