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Storage device disconnect

I use 2 Seagate external hard drives connected to my MacBook 2015, one 1TB for Time Machine backups and one 1TB for my iTunes music and film library. The devices frequently disconnect -- not physically, but with a virtually message on my screen. I would like to know why this is and how to prevent this.

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All Answers

Best Answer chosen by tantejoan

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If the "virtually" is about a device

In reply to: Storage device disconnect

that has disconnected incorrectly, then the problem could be a couple of things.
First the easy to fix thing.

I am going to guess that both these Seagate external drives do not have a power supply of their own and are of the type that draw all their power from the USB port.
If that is correct, then the problem is that the USB port on your MacBook 2015 do not supply sufficient power to drive both the devices.
This is a common thing with the MacBooks.
The easy answer is a powered USB hub, one that has its own power supply and which can provide enough oomph to drive the two devices without a hitch.

The, not so easy to fix, hard thing.
There is a "slight" possibility that there is a logic board problem that, unless you have AppleCare on that machine, would be cost prohibitive to replace.

I'm betting on the first option


Post was last edited on July 22, 2017 6:18 AM PDT

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More to my storage device problem

In reply to: If the "virtually" is about a device

Thanks for responding. I suspect you are correct in the first option, but the solution sort of stymies me. My Macbook has only one USB 3.0 connection, so my added externals all connect via a Hoo-Too adapter that draws from the Macbook. Is there another way to connect my external hard drives and not drain the main source?

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Not familiar with the Hoo-Too adapter but,

In reply to: More to my storage device problem

I did look them up and found that they have a device, USB 3.0, that has it's own power supply and does not draw power from the MacBook. will take you there.

I presume that at least one of the Seagate drives does not go with you all the time, probably the Time Machine one, so there would be no problem with the powered hub as it would remain at the house, connected to its power supply.

If you take the other one with you, then the original, USB powered, Hoo-Too device will suffice.

Hope this helps


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Further to Not familiar with the Hoo-Too adapter but,

In reply to: Not familiar with the Hoo-Too adapter but,

Thanks, I appreciate your help on this. I was not familiar with the Hoo-Too you pictured but have queried them directly about my issue.

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(NT) What was their response?

In reply to: Further to Not familiar with the Hoo-Too adapter but,

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