Hard drive will not mount

[csias40]

I will try to find someone with a windows computer.  Since it won't even mount, I can't even check it in any way.  Not sure what my machine is, but I have tried it on two different machines, both with Linux Lite.  For the record, it used to work on both of these machines.  It got locked up in a file transfer, and I had to shut the machine down.  Now it won't mount at all.