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Synology Cloud Sync is only uploading small files
I have a Synology NAS (DS418Play). I want to use Cloud Sync to back up some folders.
I'm running DSM 7.2.2, Cloud Sync 2.7.2 (Newest).
I have 2 test folders, one encrypted, one clear. The folde...
Good though, executed, same result. Small uploads, Big is not.
- Jay
Dropbox Community Moderator
Thanks for the info. Have you tried contacting the support team for Synology as to what could be causing this?
I'll leave this post open for other users to comment in with their suggestions.
Yes, after exhausting the simple fixes, and verifying the connection using Small.txt, they had me send a set of logs. The curl command to the API is timing out:
2026-02-03T14:42:38+00:00 NAS01 syno-cloud-syncd[4104]: [ERROR] upload-download.cpp(262): Curl error: curl(28), http(0), proto(-210), msg(Operation too slow. Less than 1 bytes/sec transferred the last 300 seconds)
2026-02-03T14:42:38+00:00 NAS01 syno-cloud-syncd[4104]: [INFO] worker.cpp(887): Worker (15): HandleError: Connection timeout.
