Can't read the SD Card when I upgrade Synology 412+

I use the Transcend USB 3.0 card reader (model TS-RDf8K) to connect my DS 412+, a month ago can read the SD card under file station, but DS 412+ cannot read the SD Card (Toshina Exceria 16GB and Sandisk Ultra 2 16GB )when I upgrade to latest ver (DSM 5.1-5022 Update 1). I cannot find the USBSHARE1 under file station, please help.