title_body: What is the hidden file .adobe-digital-editions on my Kobo? What is the hidden folder .adobe-digital-editions on my Kobo? I just did a factory reset, but it is still there. Can I delete this?
upvoted_answer: Kobo's devices are compatible with Adobe Digital Editions. If you have books with DRM, you will need that feature, otherwise you can simply ignore it exists. 
  
  More Detail on Kobo + ADE on their Website