Share the files with &screen-buddy - now you can simply drag&drop file on remote screen to upload it to the remote computer
https://github.com/mmozeiko/ScreenBuddy/

Latency measurement for &screen-buddy
Running at 30 frames per second (currently hardcoded) it captures laptop screen, encodes it as video, encrypts and sends packets. Then on desktop it receives, decrypts, decodes and renders video - just with 1 frame latency so only ~33msec (assuming you have good internet connection)

ScreenBuddy - simplest way for remote desktop screen sharing over Internet: https://github.com/mmozeiko/ScreenBuddy

• privacy friendly - no accounts, no registration, no telemetry
• simple to use - no network configuration needed, works across NAT's
• secure - all data in transit is end-to-end encrypted
• efficient - uses GPU accelerated video encoder & decoder for minimal CPU usage
• lightweight - native code application, uses very small amount of memory
• small - zero external dependencies, only default Windows libraries are used

&screen-buddy