Kubuntu cannot access WD 4TB External Disk

The part of the result of sudo fdisk -l which shows the information about my 4TB external hard disk

Code:Disk /dev/sdb: 3.65 TiB, 4000752599040 bytes, 7813969920 sectors
Disk model: Elements 25A1
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: AF4EEA0A-C249-4980-B5E3-71565631CACBThe result of sudo ntfsfix /dev/sdb

Code:Device Start End Sectors Size Type
/dev/sdb1 2048 7813967871 7813965824 3.7T Microsoft basic data
snowmagician@snowkubu:~$ sudo ntfsfix /dev/sdb
Mounting volume... NTFS signature is missing.
FAILED
Attempting to correct errors... NTFS signature is missing.
FAILED
Failed to startup volume: Invalid argument
NTFS signature is missing.
Trying the alternate boot sector
Unrecoverable error
Volume is corrupt. You should run chkdsk.The result of sudo ntfsfix /dev/sdb1

Code:snowmagician@snowkubu:~$ sudo ntfsfix /dev/sdb1
Mounting volume... ntfs_mst_post_read_fixup_warn: magic: 0x44414142 size: 1024 usa_ofs: 23903 usa_count: 2242: Invalid argument
Record 0 has no FILE magic (0x44414142)
Failed to load $MFT: Input/output error
FAILED
Attempting to correct errors... ntfs_mst_post_read_fixup_warn: magic: 0x44414142 size: 1024 usa_ofs: 23903 usa_count: 2242: Invalid argument
Record 0 has no FILE magic (0x44414142)
Failed to load $MFT: Input/output error
FAILED
Failed to startup volume: Input/output error
Checking for self-located MFT segment... ntfs_mst_post_read_fixup_warn: magic: 0x44414142 size: 1024 usa_ofs: 23903 usa_count: 2242: Invalid argument
OK
Unrecoverable error
Volume is corrupt. You should run chkdsk.The result of chkdsk under Windows
Code:Corrupt master file table. Windows will attempt to recover
master file table from disk.
Windows cannot recover master file table. CHKDSK aborted.