okay.... I have mint17.3 on the computer that it doesn't like to boot from. I have mint 18  on my laptop and I just plugged the external and got aninfo window that says:

Unable to mount TravelStuff
Error mounting /dev/sdb1 at /media/michael/TravelStuff: Command-line `mount -t "ntfs" -o "uhelper=udisks2,nodev,nosuid,uid=1000,gid=1000" "/dev/sdb1" "/media/michael/TravelStuff"' exited with non-zero exit status 13: Incomplete multi-sector transfer: magic: 0x454c4946  size: 1024  usa_ofs: 48  usa_count: 0  data: 18  usn: 17: Input/output error
Record 0 has no FILE magic (0x44414142)
Failed to load $MFT: Input/output error
Failed to mount '/dev/sdb1': Input/output error
NTFS is either inconsistent, or there is a hardware fault, or it's a
SoftRAID/FakeRAID hardware. In the first case run chkdsk /f on Windows
then reboot into Windows twice. The usage of the /f parameter is very
important! If the device is a SoftRAID/FakeRAID then first activate
it and mount a different device under the /dev/mapper/ directory, (e.g.
/dev/mapper/nvidia_eahaabcc1). Please see the 'dmraid' documentation
for more details.

what can I do?
(fyi.... the external unmounted itself as  I was copying files to it)

On Fri, Nov 11, 2016 at 12:08 PM, Michael <bmike1@gmail.com> wrote:
something is temperamental.  I replugged it in multiple times and it finally detected it. I do not know if it is the cord, plug, or device though.

On Fri, Nov 11, 2016 at 11:46 AM, Michael <bmike1@gmail.com> wrote:
What in the world? It was autodetecting the last time I plugged it in. Could someone help?

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