Are you using Hyper Backup? That seems to support S3-compatible destinations, including GCS, at least in DSM 6.1 - https://www.synology.com/en-us/knowledgebase

Are you using Hyper Backup? That seems to support S3-compatible destinations, including GCS, at least in DSM 6.1 - https://www.synology.com/en-us/knowledgebase/DSM/help/HyperBackup/data_backup_destination https://www.synology.com/en-us/knowledgebase/DSM/help/HyperB...