There exists a script or a software in order to convert dxf-files automatically from a website. There are several folders in the website and the script must be started from each folder manually.
The size of each folder has about 1-5 GB, so a fast internet is necessary.
The files should be downloaded into a new or specific gmail account or the connected cloud.
Finally all the files should be zipped and copied to an usb-stick and sent by post to my office.
The job should be done in a few hours, the main thing is to download the files.