MacBook Pro Retina (Late 2013) external drives problem

Hi, I just recently got new rMBP, its running all the latest software and OS and I am experiencing weird problems with all my external drives. First I tried TB Lacie 6TB and it kept disconecting and "improperly ejected" popup displays. We returned it and ask for new one but it kept happening even with my other USB WD drive and USB card reader.

I looked up on the internet and it seems like lots of people have the same problem, I find it weird nobody mentioned it here (or I missed it). I am debating now should I just return it or hope its some Mavericks bug that will be fixed in some future update. Anyone had similar experience and know how to fix this?