title: Samsung EVO microSDXC (128GB, Class 10) writespeed 150kb/s
body: <p>I am copying milions of files (30kb each) to the microSD card (with fastcopy) from my SSD. at the beginning it was copying with ~1.5 MB/s. now it is down to a steady 0.15 MB/s (after 20gb). </p>
  
  <p>File system is exFAT, allocation unit size is 8kb. The card is connected trough a USB 2.0 adapter to the PC. Card and adapter are cooled with an external fan.</p>
  
  <p>(ca. every 1h the pc loses connection to the sd card and i have to run chkdsk.)</p>
  
  <p><a href="http://imgur.com/oEkIejh" rel="nofollow">CrystalDiskMark</a> (situation right now)</p>
  
  <p>how can i improve my situation? right now it would take me 6 days to copy all my data..</p>