Can only read/write files in my hard drive if i have admin

i need to use my second drive for games, i partitioned it in gparted in brtfs


By default it will be owned by root. You need to change the ownership to your user account and group.

Also, you probably shouldn’t use automounting for that volume. You should mount it permanently in /etc/fstab

Lastly, if you are using btrfs, it would be better practice to mount a subvolume instead of the whole partition.

Sorry, i am new to Linux, please could you tell me how to do that.