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OK, this is an interesting problem.
So, I have an external SSD in a USB3 enclosure, and I've been moving my Steam Library onto it.
The SSD is a Samsung EVO 850, 500GB drive. I've tried two different enclosures, a Startech and an Orico. Both behave the same way.
The enclosure is hooked up through the keyboard base of the Surface Book via one of the USB3 ports.
The problem I'm encountering is when the drive is busy writing files the base seems to disconnect and the drive disappears. It eventually remounts, but of course the damage is done...
To test this issue, I ran Crystal Disk Mark 5 on the external drive, and the read cycle is fine. Once the write cycle begins, it seems to hang up and then suddenly the drive disconnects.
Anyone have any idea what might be going on here?
Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.
Somehow I missed this post when I created mine: http://answers.microsoft.com/en-us/surface/forum/surfbook-surfdrivers/surface-book-devices-disconnecting/f70035bd-7aa4-4f9e-88de-47f252002ec8?tm=1448859308876
But this sounds like the exact same thing, also happening when trying to store Steam games on a USB3 SSD. I've made absolutely no progress in fixing this, but this issue is doing a very good job of corrupting files on my SSD.
So, after a few hours of tinkering, it seems to be some odd issue with the USB3 port near the back of the keyboard base. It seems if there is an SD card plugged in, and the external drive is attempting to do large writes, both the SD card and the External drive disconnect. It happens almost all the time, in a few instances it remains connected, but it's more often the drive and SD card drop. This does not happen on the USB3 port right next to the SD card slot... I can only guess it might be a power issue or defect on my Surface Book. I'll need to spend some time talking to the support folks to see what they think.
If anyone has any ideas, please chime in.
