Showing the same thing here, both were 12.9 GB with a time stamp of 1:39am and 1:43am CST. Unless a Symantec employee comments on it here, I would suggest a call to support.

If you look in the files, they are for different days though, roughly 650 MB in size each. I don't think this was from an update last night though. I have 2 new files in there from last night each is about 650-660 MB

You can contact to symantec support for the quick solution

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Hello,

Could you please let us know the Revision numbers of the definitions you see inside these folders?

Let me check the same for you...!

I can confirm the same.... there are 2 folders with about 10gb in size

content inside has different date though

Not sure if this is helpful but folder name as below:

{535CB6A4-441F-4e8a-A897-804CD859100E}

{07B590B3-9282-482f-BBAA-6D515D385869}