There are a few things that could cause this issue:
1. The file system on the partition is corrupt and needs to be fixed.
2. The partition is damaged and needs to be repaired.
3. There is not enough free space on the partition to format it.
If the file system is corrupt, you can try running the "fsck" command to fix it. If the partition is damaged, you can try running the "repair" command. If there is not enough free space, you will need to delete some files or resize the partition.