These are good USB flash drives in a very small size. Convenient to use in my laptop. I can leave (very small) flash drive plugged in when traveling or just while moving about without worry of accidentally breaking it or it becoming dislodged.These don't have the fastest transfer speeds but transfer a large amount of data reasonably fast considering their larger capacity. The lanyard is a bit small and difficult to thread so, I don't use it...I use a multi-card/drive case. Still, overall, I'm happy with these nice small flash drives.FYI: These drives comes with SanDisk Secure Access software capable of encrypting and password protecting your data. 

Question: How is the capacity?
Answer: transfer a large amount of data reasonably fast considering their larger capacity