What's the reason make your USB Transfer Speeds Slow Down?

As we all know,most users expect their usb sticks when do data transfer want keep same Transfer Speeds, Unfortunately, several factors, including but not limited to the type(s), size(s), and the number of files being transferred, can cause slowdown during file-transferring activities.
 
1. Transferred files Type and Size
Most obvious explanation for a slow transfer speeds is the size and type of files transferred.Such as Large video or audio file , high resolution images, it will take longer to move them from one location to another
 
2. Number of Files Transferred at once time
Another factor that can slow down USB transfers is the number of files being transferred simultaneously: The larger your batch size (the total amount of items you're transferring) and the higher their combined file sizes, the greater strain it will put on both systems to move them from one place to another in an efficient manner—which could result in slower transfer speeds overall.