why the read speed of a usb drive is much graeter than of their write speed?

[Muneeb Ahsan]

please can someone explain in detail why the heck the the read speed of a usb drive is much graeter than of their write speed??? Thanks in advance, i'm really curious to know the reason behind...

 

[USAFRet]

Pretty much the same reason that you can read faster than you can write.

Writing involves more operations (I/O) than just reading.
Read the File allocation table
Find an empty space
Write
Verify
Write to the File allocation table

vs
Read the File Allocation table (to find what you're looking for)
Read