Solution:
The size of general electronic teaching materials ranges from tens of megabytes to hundreds of megabytes. When exporting teaching materials, if the remaining capacity in the U disk is not enough to accommodate the teaching materials, the export will fail. Redundant files need to be cleared or a USB flash drive with larger capacity needs to be replaced.
What should I do if the teaching materials imported by using USB flash drive prompt that the authorization time has expired?
You need to open the client in the networked computer and update the authorization on the USB flash drive interface to get offline use for 30 days again.
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