What is a file manager? Give an example the file manager is a user medium platform interface

The Android File Manager app helps users manage and transfer files between the smartphone's storage and a computer. ... The Android operating system allows you to remove apps quickly if you no longer use them or to make room for additional files without having to connect the phone to your computer.

Explanation:

government control and resources

the first successful, urban blues recording, selling more than 75,000 copies, was made in year 1920.

mamie smith recorded the first commercially successful example of the urban blues,   with the recording of “crazy blues”."crazy blues" was recorded on august 10, 1920, in new york city. within a month of the release of “crazy blues” it had sold 75,000 copies.