Memup hard disc does not show in Finder

I have attached a Memup 250GB hard disk by USB to my MBP. The disk does not show up in Finder, nor in Disk Utility.
The disk works fine if I plug it into a PC. I have formatted it on the PC to FAT.
Any suggestions on how I can get it to work on my MBP?

Sounds like you have a connection issue. Try all the USB ports and a different cable.
Ciao.

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Hey Hatter, Thanx for the input.
Among other things I tried was a terminal routine someone suggested with no luck and new drivers/firmware for the drive, again, no luck.
I still don't know for sure what caused my problem, but I re-partitioned the drive and re-formatted it and that seemed to solve the provlem. Sadly, I lost all my info that was backed up on that particular drive but hopefully it won't come back to bite me later.
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/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk0
   1:                        EFI                         209.7 MB   disk0s1
   2:                  Apple_HFS basecampHD              999.3 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
/dev/disk1
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   0:      GUID_partition_scheme                        *1.0 TB     disk1
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   2:                  Apple_HFS HD2                     999.9 GB   disk1s2
/dev/disk2
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   0:      GUID_partition_scheme                        *1.5 TB     disk2
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   2:                  Apple_HFS THIS DISK               1.5 TB     disk2s2
/dev/disk3
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   0:      GUID_partition_scheme                        *1.5 TB     disk3
   1:                        EFI                         209.7 MB   disk3s1
   2:                  Apple_HFS TTHIS DISK.Backup        1.5 TB     disk3s2
/dev/disk4
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:        CD_partition_scheme                        *217.8 MB   disk4
   1:              CD_ROM_Mode_1 TSIXL-320W              189.7 MB   disk4s0
/dev/disk5
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     FDisk_partition_scheme                        *3.0 TB     disk5
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Memup hard disc does not show in Finder

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