I am running Ubuntu from a USB pen on a laptop, and trying to partition the disk on the laptop. There are currently no partitions. The partition table (type) is 'gpt'. I would like to set some flags, but I am not able to. Whether I create FAT32 partitions or NTFS (haven't tried others), the "Manage Flags" is grayed out.
What are the reason(s) I can't add flags?