Macbook pro doesn't see lexor 16gb usb memory stick. (Windows PC does see it)

Heading says it all. I'm baffled. Windows PC sees the memory stick but my MacBook Pro doesn't.
Plese help.
TJ

Mac's are very very particular about the Ram they use. Mac's historiclly only seem to like top of the line when it comes to Ram.
http://www.crucial.com
or
http://eshop.macsales.com/shop/apple/memory/
Both of these are considered the top of the line in Ram.
I have been in computers since 90 and I am not at all familiar with Lexor Ram

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Macbook pro doesn't see lexor 16gb usb memory stick. (Windows PC does see it)

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