QuoteSo you mean I just can't use my uSD card directly using Imager and I need to prepare the card first, to flash it via gparted in FAT 32 ? But do I need to make different partitions in FAT 32 on the sd card ?
No - I mean that you said you hadn't flashed it. Raspberry Pi imager and Balena Etcher both flash micro SD cards - I was trying to clarify what you had done if you hadn't flashed it. Flashing = writing the img.gz file to the uSD card using an imager program. If you used Pi Imager and manually selected the downloaded img.gz file with no customisation you've done the same thing as me.
QuoteI din't try any other uSD card because I really didn't have a clue it could work with a software and not working with another one. And I don't have any other uSD card. Is there one size and constructor that is better ? So I can buy one to see if it works best.
uSD cards can fail in many ways - it's just a normal troubleshooting step. There are very few things that can go wrong - but the uSD card is one of them.
I always use Samsung EVO cards - seldom had an issue with them. As for size - it depends what you want to store on the uSD card. If your media is on external drives and you just want to keep your library on your uSD card - then 32GB or 64GB is probably fine. I buy the 64GB and 128GB these days in the Pis I still use uSD cards with (I've got Pi 5s running NVME SSDs on M.2 hats)
Using linux without beeing a geek, it's too complicate for me to install balenaEtcher since they don't have a .deb file for it.
Do you only have Linux computers?