I have a Samsung A7 (2017) i wanted to know of you can send audio and screenshot files from your internal storage to SD card without really having to access "my files" and just send it automatically.
You have to use something - files don't just move by themselves. (Even in Windows, you have to drag a file from one place to another in Windows Explorer.
Some apps let you choose where to save the files to, some apps do not let you choose.
Check the settings for the individual apps you are interested in.