Recently I have upgraded the OS to mojave, after the upgrade I see the write option is disabled for my hard drive Seagate. NTFS format is done for the hard drive. Any one here facing this kind of issue?
macOS cannot write to NTFS-formatted drives without the aid of a third-party utility. If you were able to write to the drive before updating, I would suspect you had such a utility installed, such as Tuxera NTFS or Paragon NTFS, and it needs to be updated to support macOS Mojave.