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I installed thunderbird on a second laptop and now have lost all my files, which were extensive, on my first laptop; how do I find them?

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The old laptop showed all my files for about one week and then, one morning, just disappeared! It is like the account reverted to the new laptop files. I did not have any personal files set up on it yet. Is there a way to restore my personal files on the first laptop?

The old laptop showed all my files for about one week and then, one morning, just disappeared! It is like the account reverted to the new laptop files. I did not have any personal files set up on it yet. Is there a way to restore my personal files on the first laptop?

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Did the missing "files" appear on the new computer?

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No. They did not appear on the other laptop.