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Too slow when copying files?

July 11th, 2010

Too slow to copy files The problem is caused by either the user’s PC not supported a USB 2.0 port or
the product not being connected to a USB 2.0 port.

When connected to a USB 1.1, it has a transmission speed of about 1 MB/s which is
very slow.

To solve the problem:

  • Install a USB 2.0 driver
  • Connect to a different port
  • Purchase and use a separate port if the PC is not equipped with a USB 2.0 port.

Also the speed can be decreased when using a USB 1.1 cable that is not shielded.
Use the cable provided with the product or purchase a USB 2.0 cable.

Checking whether USB 2.0 is available

On Control Panel▶Administrative Tools▶Computer Management▶Device Manager click and expand the + sign of the ‘Universal Serial Bus Controller’ on the right window. If ‘USB2 Enhanced Host Controller’ is installed as shown below, USB 2.0 is available for use.

'USB2 Enhanced Host Controller

When it is not installed, either check or try following instruction:

1. Install Chipset Driver of Main Board.

2. Re-install the USB Mass Storage Device Driver.
Connect the external hard drive.Then on StartControl PanelSystemHardware▶Device Manager, right click the USB Mass Storage Device of Universal Serial Bus controllers and select ‘Properties’.

Device Manager

– When ‘USB Mass Storage Device Properties’ window opens, click Uninstall on Driver tab then click OK when the pop-up opens.

'USB Mass Storage Device Properties'

– Disconnect, then reconnect the external hard drive.
When ‘Found New Hardware’ window appears on the bottom right side, wait until the completion message is displayed. (It takes a while to automatically install the driver.)

– Check whether the Samsung External Hard Drive appears on the Disk Drivers of Device Manager.

– USB Drivers are installed separately on each port, so the above process should be repeated as many times as needed by connecting the external disk driver to each USB port.

3. Checking EHCI Mode of BIOS Setup
In case there is an item that sets EHCI mode in PC’s BIOS Setup, check whether the item is Enabled or not.

4. If the problem persists even after trying the above instruction, refer to the link in below or upgrade each OS to the latest version.

– USB 2.0 Support in Windows 2000
– USB 2.0 Support in Windows XP

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