It does not matter at all, if you try from within the device or from your PC, which might be favored because of bigger screen size.
Take your time for this recovery, because this application is somewhat special, meaning has its own interface.
The corrupted filenames indicate the broken data transfer, deb files are the installable application files for the N900. But you rather transfer the files from your PC again tobe sure they are 'healthy'.
Well its three in the morning for you, it is twelve'o'clock here, do it not now. Good night!