Solved Transcend M3 external HDD not detected

December 26, 2017 at 06:14:31
Specs: Windows 7
This problem has been reported on various websites but I've yet to see a clear solution...
Please help!
The external HDD is a StoreJet Transcend 1TB model no: TS1TSJ25M3.
The drive is not recognised on "Computer" but does come up on "Devices and Printers" and the dialog suggests it is working properly.
I promise I have tried all the obvious stuff, and stuff recommended by many posters, including:
Checking for power supply
Checking with different USB cables
Checking on different computers
Checking with different OS
Uninstalling/re-installing
Re-installing drivers
Checking and re-installing latest firmware.
A similar Seagate external HDD works perfectly and is recognised normally.
The closest I have got to the problem is confirming, after useful advice, that the drive is not being allocated a letter. This shows up using the Disk Management software provided with Windows. The recommended solution was to right click on the (unlabelled) drive and use "Change Drive Letter and Paths...". This seemed very sensible, but the command was not available, and appeared only in faded type. The only options were "Delete" and "Help".
Does anyone have any suggestions I haven't tried yet? My best guess at present is that the fault is with the drive, and it will just have to go back...It's less than 3 months old, was a gift to my son, and has never worked, so has no data on it.
Many thanks, and a very happy Christmas to you all, and all the best for 2018

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#1
December 26, 2017 at 08:54:12
What exactly shows up in Disk Management? If it shows unallocated space (should be approx 931GB), you will have to partition & format the drive. Afterwards, it will show up in My Computer & will be available for data storage.

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#2
December 26, 2017 at 09:13:32
Riider, very grateful for your feedback, particularly so promptly, and over the holiday - thank you.
Disk Management shows three partitions - "200MB Healthy (EFI System Partition)", then "931.19GB Healthy (Primary Partition", then 128MB Unallocated.
If I understand you properly, then it looks as though the drive has already been partitioned. Is it worth trying to do this again? If so, is there a Windows utility that I can use, or do I need to find some software to do this?
Thanks again

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#3
December 26, 2017 at 09:37:26
✔ Best Answer
Delete all the partitions so that you have nothing left but unallocated space. Then create one partition encompassing ALL the available space & format as NTFS. If you can't do it using Disk Management, try EaseUS Partition Master: https://www.easeus.com/partition-ma...

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#4
December 26, 2017 at 11:45:31
Riider, brilliant - genius, thank you. Deleting the main partition worked well, as it then offered to allocate a letter for the drive and all was good. Only hint as to cause was that it said the partition was not done by Windows. Just possible that my son completed partition on his MacBook although his account is that he couldn't do anything with the drive, and he didn't understand what formatting meant, so I'm really not sure.
However, very grateful to you, and many thanks for taking the time on a holiday.
Mucho respect! And have a great 2018 with my thanks.

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#5
December 26, 2017 at 11:51:29
For future reference, if the partition contained a file system Windows recognized but wasn't assigned a drive letter, you can manually assign the letter by right-clicking on the partition, and selecting Change Drive Letter and Paths

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#6
December 26, 2017 at 11:57:10
I did try that earlier but the option didn’t flag up - only Delete and Help - so was very grateful for your earlier suggestion - thanks again

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