Multiple Flash Memories (Read the description)

I apologize for my bad behavior in the community, so I did this level. I've been sad and angry the last few weeks, and I could not contain my anger.

Controls:
Slider: Choose Number
S: Save In The Internal Memory
W: Show (in the screen) Internal Memory
A: Show (in the screen) External Memory
D: Save In External Memory (hold for a second minimum)
F: Delete Internal Memory (release slider to do it)
Note: for delete external memory, just save on it the "deleted internal memory". Maximum capacity: 4 bytes, if you write more than 4 bytes, the first Byte or number will be deleted automatically.

Ideas for an arm to change the external memory.