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Unfortunately, since there's no way to directly connect the storage drive of the L1020 to a PC (unlike removable SD Cards), those temporary files cannot be browsed through or accessed*. The only that the user can do about those temporary files is to clear them.
*- Note that even if the storage drive could be directly be connected to a PC, there's still no guarantee as to how the temporary files can be accessed or if those files can be useful at all. Re-writing the note itself would be easier rather than trying to recover the lost file.