Q: WHAT ARE THE POSSIBLE SECURITY RISKS WHEN IMPLEMENTING FILE SYNCHRONIZATION?
A: In addition to all of the security risks present for any mobile device, computer, and server, there are a few other issues to be watchful of:
All data must be encrypted during transfer.
All data must be encrypted at rest (in storage).
Devices at both points need to be secure from physical access.
Any computers and Mobile devices involved in the synchronization must have full disk encryption, quality antivirus which is kept up-to-date, users logging in with non-admin accounts, and application whitelisting to prevent malicious apps.
If you are looking at file synchronization with a cloud service, I’m fond of Google G-Suite for Business. They meet and exceed any security requirements, even for HIPAA and SEC, with a price-point that is highly competitive.