which file to flash firmare?

Hey I wanted to reflash shelly however I downloaded two archives.

One contains one file extension .bin and it supposed to be flashed as it is.

The other one contains several files and I am not sure which one to flash. Files in the archive are

esp:init_data...bin;

fs.bin;

manifest.json;

rboot.bin;

switch25.bin.

Any help would be much appreciated.

One last question. If flashing tasmota firmware are all the functions available? Is it still necessary to use the shelly cloud?

Thanks, is there a specific procedure/sequence to flash the files or just flash them with the tool and job is done?

Still a doubt for the files in the archive...shelly 1 archives:

- one file is shelly1pm.bin is 2,2 Mb;

- 5 files are total of 826kb....what am I missing?

...very last question. So when wanting to go back from any other firmware back to original shelly which must be used? recovery or update?