Standard SD cards and MicroSD cards can be painful to erase and partition

I tried to erase all data from my MicroSD cards not in my cellphones.

The idea was to copy some films from my PC and watch them by smart TV.

It was painful to erase them.

May be because I am using only Linux.

With Windows it may be a different story, I believe.

They can.handle only FAT partitions.

With 32 and 64 GB carfd,  Linux prefer them to be partitioned them with gpt but they won't Boot or Mount afterwards.

No problem with nonproprietary MicroSD cards.