I was thinking of renaming every images extension to PNG but as my lap is crapped out and i am broke as hell i would have to do it on phone is there any good app on fdroid that can do it in a bulk ? Also does renaming the end from “jpg” to “png” actually change the format ? This pictures are very important to me as they have an imotionall connection to me.
On a less important is this the same for mp3’s too as i save my favourite songs in the same way as a zip file is m4a better ?
Renaming the files wont change the filetype.
Also the images won’t loose quality for looking at them, opening or moving them. Only if you reapply the jpg compressing algorithm over them.
Does compressing the files using .zip over and over make them lose quality ?
No.
File compression and image compression are different things. In lossy image compression you throw out some data when re-saving the file and that’s not reversible; in file compression you don’t throw data out, so it’s reversible. It’s like rewriting a sentence in shorthand. All the information is still there, and if know the shorthand you can rewrite it back to plain English again (decompressing the file).