USB won't work after I unplugged without disconnecting now won't recognize any USB devices?

I put my Sandisk memory stick in to take some files off , i forgot to disconnect it properly so i plugged it back in and now it wont recognize any memory sticks i put in ? How do i fix it ?

Hello there, hales07.
The following Knowledge Base articles provide some good recommendations:
OS X Mavericks: If a USB device isn’t working
http://support.apple.com/kb/PH13876
You may also want to try an SMC Reset:
Intel-based Macs: Resetting the System Management Controller (SMC)
http://support.apple.com/kb/ph14222
Thanks for reaching out to Apple Support Communities.
Cheers,
Pedro.

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I have this problem on my late 2011 Macbook Pro 13 inch,
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USB won't work after I unplugged without disconnecting now won't recognize any USB devices?

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