EspoCRM Upload Directory and Sub-Content Function

Need to add the ability to upload folders and their sub-contents to the crm. Currently our espocrm has the function to select multiple files for upload and drag-n-drop as well. Need to be able to select a complete folder and for it to upload to the crm with it's content and sub-directories. The admin should also be able to select which account or contact this belongs to. Hired personal should have extensive experience with espocrm or similar platform.