java.io.IOException: Permission denied 写入可移动 SD 卡时出错

Question

I have give read and write permissions in manifest file and with code. I am able to create files in phone storage with no problems and its absolute path is /storage/emulated/0

But When I try to write file in my removable sdcard with file.createNewFile() to thw path /mnt/media_rw/33A9-10F2 , it throws an error

java.io.IOException: Permission denied

It is possible to download a file from that location using Download manager. Please help me to solve this issue...

Answer 1

You do not have read/write access to arbitrary locations on removable storage on Android 4.4+.

DownloadManager is powered by a system app, and system apps have greater ability to work with the filesystem than do ordinary apps.

I am able to create file in phone storage with no problems.

You do not have access to most of external storage on Android 10 (by default) and Android R+ (for all apps).