Thank you for contacting me. In the case of sending medical files, the data must be anonimized. When sending the medical data, you declare to have the written authorization of the patient to do it. If the data is DICOM files, it is convenient to generate a compressed ZIP file containing the data. In case the file is too large, we recommend using a secure hosting service online, such as WeTransfer, Dropbox, Google Drive and share the link with the message.