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 Originally Posted by TouchpadTim
1) Is there a way to check the size of the var partition and a standard size to compare it to to verify it is, in fact, too big?
Yes. Connect your USB cable from your PC/Mac to your TouchPad, and use the novaterm command to access the command-line environment on your TouchPad. Then, type "df -h /var" (without the quotes) to get an overview of usage of your var partition. Here is what it looks like from my own TouchPad:
Screenshot_2017-11-04_07-20-15.png
The "Size" column tells me my var partition is a total of 62 Megabytes.
The "Used" column tells me I've got 48.3 MB used out of that 62 MB total.
The "Available" column is the difference between the 2.
The "Use%" expresses the amount used as a percentage.
My own rule of thumb is if I start to see weird behavior on my device, like files not downloading, or apps not behaving normally, if this Use% is over 90%, it's time to clean out the var partition.
I am 99% sure this file is just the contents of what you have downloaded with your browser, seen below. You say 1.5 MB is so small, but if it's 1.5 MB out of 62 MB total, it's a lot!
browser_2017-04-11_071601.png
3) Is there a way to backup the downloadhistory.db file? I can get to it in Internalz, so I could delete it that way. But in USB mode, I can't access it so I don't see how to back it up. (Or is backing it up just pointless and there's no reason to worry about that?)
No need to back it up. It's just your history of files previously downloaded, and will be re-created by the browser app. If you want to, you can copy it from /var/luna/data over to your media partition, and then from there to your PC/Mac, but there is no need, unless you want to preserve your download history for some reason.
4) Is there any reason to back up anything else before deleting these things on your list?
No. The files and directories I listed are safe to delete, or to delete from. There are other folders under var that are more of an unknown, so I wouldn't go there yet.
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