Canon VIXIA HF M30 Quick Manual page 545

Importing to computer
Importing stops halfway.
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 Try another USB port of the computer. For desktop computers, try the USB port on the back.
It takes a long time to import video from the camcorder to the computer.
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 It takes a long time when importing many files in one batch or importing a large video file.
When importing, close all software other than ImageMixer 3.
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Processing speed may vary depending on your computer's configuration (for example, CPU
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performance and RAM), or on the content of the video.
 If software is running in the background, exit them before importing.
The message "Could not save some files." is displayed.
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 This message is displayed when there is insufficient space in the disk to store video files or in the disk
used for work space. Change to a disk with sufficient space or reduce the number of video files.
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