I just check the log and it starts this way in every scan in the big folder…
May 28, 2018 22:04:37.903 [7964] DEBUG - Path matched, we’re reusing media item 1
May 28, 2018 22:04:37.905 [7964] DEBUG - * Scanning 101 Dalmatians
May 28, 2018 22:04:37.905 [7964] DEBUG - Looking for path match for [M:\Movies\101 Dalmatians.mkv]
May 28, 2018 22:04:37.906 [7964] DEBUG - Path matched, we’re reusing media item 2
May 28, 2018 22:04:37.908 [7964] DEBUG - * Scanning 102 Dalmatians (2000)
May 28, 2018 22:04:37.908 [7964] DEBUG - Looking for path match for [M:\Movies\102 dalmatians (2000).mkv]
The problem is that for each one, it loads file from Drive and check something (I don’t know why).
Why is downloading data if it see that the file is the same name and is unmodified date since the last update?
For this reason, the scan for the library tooks one hour. 