File transfer can be a security issue as most people use unreliable ways to transfer files over the network. Big corporations like Google, Apple and Microsoft collect more and more personal information about their users. Google Drive, Proton Drive, and Aicloud services are very convenient to use, but they are centralized and you have to trust third-party data. Therefore, it is recommended to look at non-commercial and open-source projects like LocalSend, OnionShare, PairDrop, and gofile.io. All these applications are encrypted and allow file transfers between devices safely.