Back in 2010 I found a really tiny Micro SD usb adapter at this point it cost 3.72 USD and was titled and sold by Dealextreme Titled Kawau Smallest MicroSD TransFlash TF SD/SDHC USB 2.0 Card Reader Keychain
Item Number 25557. I liked it so much I ended up buying a few more at that price over the next two years.
Then there was a seller on ebay who sold them for $2.49 CAD in 2012 I ended up buying 4 they were great!
Titled SMALLEST MINI BLACK USB Adapter Micro SD TF T Flash Memory Card Reader Fr Mac PC
Item number 190729873906.
I wish I had bought more as they seem to have increased in price for some reason.
Cheapest I can find them on the internet is on ebay $5.69 AU item no 171851200786.
They all are the same design as this one http://www.ebay.com.au/itm/PNY-Micro-SD-SDHC-TF-Card-Reader-… . It has the little yellow slider that allows you to the push the Micro sd card out and is so tiny that I can leave it in my laptop without worrying about it damaging the port when I put it in a bag and such.
I've tried looking at DX.com lowest I could find for a similar model 5.79 AUD
Couldn't find any cheaper on Aliexpress and ebay at $5.69 AUD.
Thanks for reading all this and any assistance you can bring!
Be careful make sure they can read or compatible with micro sdhc format, ie above 32gb capacity