Why can't my external data write (its says due to change in android OS.)?

[AC Question]

why my external data can't write ? its says due to change in android OS..

can you fixed this problem please...

 

[B. Diddy]

Re: why my external data can't write ? its says due to change in android OS..

Welcome to Android Central! Which device, and which Android version do you have? KitKat and higher versions have more restrictions on SD usage by apps--see this article for info: KitKat and SD cards — what's fixed, what's broken and what's misunderstood | Android Central