Enterprise Search in O365

I Would like to say that the client have some requirement in SharePoint 065.

Is there any way to connect SharePoint 0365 to External drive or P-drive for Enterprise Search ?

means client wanted for if anyone trying to search any document or anything on 0365 then the data will fetch from the external drive or p-drive.

Actually Microsoft has already provide some default features for searching anything those are present under 0365 but they need to search data from both internal and External.

Example-in my computer have C-drive and D-drive with some data is present under those drives but they want to if someone search same data on 0365 then it will be showing over on 0365 with data is there under Cloud like CRM or Outlook .

Please let me know if you have any knowledge that related to same requirement otherwise send me some article for reference then I will prepare a document and send to client.

Please help me because I am new in SharePoint and no one is here to support me .