How to send a file to SIM module

Hello there, I have a sim800L and i gogled a lot and there are many examples of how to send /read file with sim800 -900 modules but I couldn’t find a good explanation how to send a file to a sim800-900 module. I tried to find a way but couldn’t figure it out how.
I’m using various microntrollers and boards including STM, Arduino, PIC, RASP, Beagle, I have SD modules, I’m trying to store a file into SD card which sent to SIM module by a PC but stuck at the moment.
Is it possible? can I achieve what I asked? Can anyone share a resource about this please?