Yes for sure there's something seriously wrong with this app. I hope you do better with your support ticket than I did with mine.
At the risk of going off topic, I had a go with the Google Drive app and it seems to be working well here in NAS->Drive one way mode. I know you said previously it didn't work for you so I guess it's a YMMV situation but so far this looks like a more well behaved process compared to the dropbox datasync disaster area; it did manage push my 4GB+ of data in about 5 hours
For some reason this is listed in the forum as "Data Sync for Google Drive" but it's showing up in App Central as "Google Drive" here on this AS202TE. I'm sure this makes sense to someone. This asustor maintained app is based on the old open source https://github.com/Grive/grive project and it could really do with an update to the more current https://github.com/vitalif/grive2 project..so another case of asustor needing to get their act together.
It seems to work though. At least it doesn't try to reduce my hard disks to dust.