Without seeing the sessions to be exported and understanding the environment this will be difficult to troubleshoot. There are a couple of ideas that I can think of that might cause this and I have listed them below.
Option 1 - Ensure there is enough disk space where the files are being saved.
Option 2 - If this is a Corporate Environment, check for any Group Policies that might be restricting the saving of the files.
I hope this helps. Please let me know if you need any additional information. Thank you.
Eric R | Technical Support Engineer
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