RT-N66U unmounted drive

[big_AL99]

hi
having some problems mounting a usb drive on my RT-N66u my log reads below :-

Apr 24 20:26:28 kernel: usb 1-1.1: new high speed USB device using ehci_hcd and address 8
Apr 24 20:26:28 kernel: usb 1-1.1: configuration #1 chosen from 1 choice
Apr 24 20:26:28 kernel: scsi5 : SCSI emulation for USB Mass Storage devices
Apr 24 20:26:31 kernel: scsi 5:0:0:0: Direct-Access TOSHIBA External USB 3.0 5438 PQ: 0 ANSI: 6
Apr 24 20:26:31 kernel: sd 5:0:0:0: [sda] 1953525164 512-byte hardware sectors (1000205 MB)
Apr 24 20:26:31 kernel: sd 5:0:0:0: [sda] Write Protect is off
Apr 24 20:26:31 kernel: sd 5:0:0:0: [sda] Assuming drive cache: write through
Apr 24 20:26:31 kernel: sd 5:0:0:0: [sda] Assuming drive cache: write through
Apr 24 20:26:31 kernel: sda: sda1
Apr 24 20:26:31 kernel: sd 5:0:0:0: [sda] Attached SCSI disk
Apr 24 20:26:31 kernel: sd 5:0:0:0: Attached scsi generic sg1 type 0
Apr 24 20:26:31 hotplug[10221]: USB /dev/sda1(ntfs) failed to mount at the first try!
Apr 24 20:26:31 kernel: ufsd: use builtin utf8 instead of kernel utf8
Apr 24 20:26:31 kernel: ufsd: use builtin utf8
Apr 24 20:26:31 hotplug[10221]: USB /dev/sda1(ntfs) failed to mount at the first try!
Apr 24 20:26:31 kernel: ufsd: use builtin utf8 instead of kernel utf8
Apr 24 20:26:31 kernel: ufsd: use builtin utf8

its a 385 GB drive formatted to ntfs on my windows 10 pc.

any advice pwould be apprecaited?

thanks