USB 3 Sata caddies incompatible with each other

gquiring

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Oct 14, 2009
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I have two USB 3 SATA caddies that create drives that are incompatible with each other. If I format a drive in one of them it will prompt that the drive needs to be formatted before use in the other caddy. I use Win 7 x64. I am using Seagate 4TB drives.

What makes each USB caddy different? I didn't think the caddy controlled how the drives are formatted.

These are the docks I am using:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817182237
http://www.newegg.com/Product/Product.aspx?Item=N82E16816856103