Review on Basesailor USB Female to Female Adapter (3-Pack), USB 3.0 Female to Type A Female 3.0 Cable Coupler for Connecting Two USB Male Ends Cord, Extension Connector - Upgraded Version (Black) by John Bailey

I bought 6 of these and only a few worked properly. Note. If you want mass storage devices to be recognized and expect USB 3 speed (you can get performance closer to sub-USB2 performance), especially if you're mixing or using inefficient cables. The price is very reasonable, the seller is responsive. Apparently the internal circuit board had some issues in the last production batch but they have been rectified/corrected and my first order clearly had issues with this batch. Update: The seller promised to send me a replacement and did so very quickly. Received today and now everything works great as expected. I highly recommend this seller and their "BaseSailor" products!