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SFTPGo
Full-featured and highly configurable SFTP, HTTP/S, FTP/S and WebDAV server - S3, Google Cloud Storage, Azure Blob
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rclone
"rsync for cloud storage" - Google Drive, S3, Dropbox, Backblaze B2, One Drive, Swift, Hubic, Wasabi, Google Cloud Storage, Azure Blob, Azure Files, Yandex Files
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Give a try to SFTPGo. It supports SFTP/FTP/WebDAV and a the built-in web based file interface. It can "mount" existing directories (you need to give the proper permissions to the sftpgo user)
P.s. you could try using rclone (https://rclone.org/) to sync data between different locations.