Connection to the folder on remote PC

Situation - I have a desktop computer and a laptop on countryside (as portable PC, that almost always with me). I want to send several big files to desktop pc from laptop. On desktop pc I set up access to the folder and vpn with ZeroTier between them. When I start transfering files File Explorer (File Manager) starts stucking and if I try to close programm - File Explorer, it writes something like “Windows process stops” and 2 buttons: “forced closing” and “cansel”, when I press “forced closing” main screan becomes blue and bar down screan escapes. What could it be and does it healing?
Both computers has windows 10 with +/- last updates

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