internally formatted hdd not seen externally

Loxocemus

Prominent
Feb 18, 2017
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as per title i have a 3tb seagate that i partitioned and formatted internally, its fine, no errors, but when i remove this drive and put it in a external enclosure it doesn't show up (enclosure is a seagate 3.0 mains powered one).

is the partition/formatting internally different to that which is needed to be seen externally.

ps the ports drive enclosure are all ok, as iv tried them previously, also i seem to remember this happening before in reverse ie a hdd partitioned/formatted externally didn't show up internally.

any ideas?

thankyou for any and all help
 
the enclosure is actually the one the drive came from, it shows in disk management but i cant edit it in anyway. weirdly i diskpart/cleaned it externally, when i put it back internally previous files were still on it