"Time remaining" value keeps increasing when you copy lots of files in Windows 8

Applies to: Windows 8.1 ProWindows 8.1 EnterpriseWindows 8.1 More

Symptoms


Consider the following scenario:
  • You connect a Windows phone or another Media Transfer Protocol (MTP) device to a USB port on a Windows-based system.
  • You open the MTP device in Windows Explorer.
  • You drag a large number of files to a folder on the MTP device.
In this scenario, the progress dialog box for the copy process displays a Time remaining value. As the copy process continues, the Time remaining value continues to increase, and the copy process appears to keep slowing down. 

Cause


This issue occurs because Windows Explorer updates its view after each file is copied to the device. As the number of files on the device increases, the time between each file copy also increases. This is by design and reflects the expected Windows Explorer behavior.

Resolution


This behavior is by design. 

More Information


The interval between the copy job for each file increases incrementally as the files are copied to the device. The more files that you copy, the more pronounced the issue becomes.