I thought I might add my very similar situation to this thread. Thanks for reading and much appreciation for any suggestions.
I've just added a new, out of the box, expansion disk to my Atom server (3.16.0-4-amd64 #1 SMP Debian 3.16.39-1 (2016-12-30) x86_64 GNU/Linux). The system is intended to be a headless file server so there's no GUI.
I can read the pre-loaded data on the drive, but I can't write to it. Did the obvious of checking permissions, owners, etc. When the physical drive is unmounted, I can write to the mount point. Do I need to format the msftdata partition for use in Debian?
I connected the disk via USB, found sdd, sdd1 and sdd2 in /dev, and was able to mount /sdd2 at /BigSeagate:
/dev/sdd2 on /BigSeagate type ntfs (rw,relatime,uid=0,gid=0,fmask=0177,dmask=077,nls=utf8,errors=continue,mft_zone_multiplier=1)
But I can't write to the drive:
root@ch-blackhole:/home/ajh# echo 'foo' > /BigSeagate/foo
bash: /BigSeagate/foo: Permission denied
though permissions should be fine.
root@ch-blackhole:/home/ajh# ls -l /
drwx------ 1 root root 4096 Nov 3 19:20 BigSeagate
I can see data on the drive:
root@ch-blackhole:/home/ajh# ls /BigSeagate/
Autorun.inf Seagate SeagateExpansion.ico Start_Here_Win.exe Warranty.pdf
and fdisk doesn't seem to have any problem:
Disk /dev/sdd: 4.6 TiB, 5000981077504 bytes, 9767541167 sectors
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: 6B207E65-561C-41E6-801D-DD0ED965CC5A
Device Start End Sectors Size Type
/dev/sdd1 34 262177 262144 128M Microsoft reserved
/dev/sdd2 264192 9767540735 9767276544 4.6T Microsoft basic data
Partition 2 does not start on physical sector boundary.