There is no specific link or website to send me saves. Google Drive would work for example. There are various sites where you can upload your files for a limited time like https://ufile.io/ for example. Choose any option that you deem good.
But like I said before, if you still can open and play your save file, it should be alright and not corrupted. It's most likely a memory crash. If you get no error message it's usually not a bug in the game. I also heard that the rpg maker mv editor started to crash more frequent on windows 11 since 2026 because of an update but I don't know if that also affects rpg mv games or just the editor.
Unfortunately I am not very knowledgeable when it is related to things like memory crashes. Best thing is to save regularly and not play longer for 4 to 8 hours without closing and restarting the game.