Every time when I copy large files from my laptop to any pen drive (USB) on my Ubuntu 14.04, all processes slow down. Even the mouse pointer slows and is stuck. If I open multiple tasks, many of them stop responding. The copying also stops for a long time at 100%, 0 sec remaining.
I am using Windows 8.1 alongside Ubuntu in which there is no problem in copying files.
Useful Hardware Specification of my laptop : HP Compaq 15-s103TX Notebook
Processor : Intel Core i3 4005U
Clock Speed : 1.7GHz
Chipset : HM87
Cache : 3MB
RAM: 4 GB DDR3, 1600 MHz
Graphic processor: NVIDIA GeForce 820M
Dedicated graphics memory capacity: 2GB
System architecture : 64-bit
HDD: 1TB SATA 5400 RPM
Number of USB 3.0 ports = 1 (same problem here)