Actually, this problem mainly occurs when transferring files over 50 GB. Since I downloaded the Bitcoin core, which is about 600 GB, this may be the reason for the problem.
What is of big size is the blockchain, not bitcoin core itself. And the blockchain is split into a shitload of smaller files (128 MB), you are in no danger of having 50 GB size.
Your windows' backup file or some game related data files are more likely to have been causing issues.