Convert SILK to ACCDA

silk to accda conversion is most likely related to export of structured data. It might actually be possible to import SLK/SILK data files to Microsoft Access through the import wizard and save it in the default database format. But you can certainly import .silk files to Excel and produce a CSV file that you can import to MS Access.

Simply put, it is impossible to convert SILK to ACCDA directly.
Thus, there is no so-called silk to accda converter or a free online .silk to .accda converter to be found.