windows command to get size of files in folder
It can take a while for Windows 10 to calculate the data size of the files in a single directory. You can use the following script in command prompt to get the total size more quickly:
powershell -noprofile -command "ls -r|measure -sum Length"
The command gives us the file count and the number of bytes, which is 409 MB. Powershell can be activated from command prompt.
Thanks to kaartic for this idea posted here.