Kubuntu 14.04 freezing when I copy file to usb storage

[Snowhog]

What are the specs on your PC? How much RAM? CPU type?

[Behrooz]

Thank for answer but my problem is not speed of copy. I test copy file on usb 3.0 and USB 2.0 port with USB storage 2.0 version. On all case mouse freezing and KDE is slow.

[Snowhog]

Welcome.

Not unexpected. You're copying from the internal HDD to an external USB storage device. That is going to be slow, especially with large files. If you have a USB 3.0 port, and a USB 3.0 external storage device, the transfer speed would be faster.

[Behrooz]

Hi there
When I want copy large file (1 GB) on Lenovo G-500 , mouse is freezing, KDE has lag and slowly. I use before ubuntu 14.04, fedora 20,suse all distu have same problem when copy lage file to usb storage.