Drive showing only lost+found directory

I recently installed fresh manjaro and one of my drive only showing lost+found folder I can’t create new folder in it, can’t copy paste any other file or folder into it, Try to format it with KDE partition manager but it’s only showing primary partition.

Thanks in advance

When you format a partition on a device you will initially get it readonly to any non root user - it is normal.

Create a mount point for the device - mount it and change permissions on the mount point.