Extending SHR storage pool over to a DX517 expansion unit risky?

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Synology's expansion units are designed to seamlessly extend storage capacity, and the risk of data loss during such expansions is minimal. The SHR (Synology Hybrid RAID) technology provides a level of flexibility and redundancy that ensures your data's safety. In the rare event of a failure, your data remains intact on the functioning drives. Replacing the faulty unit or NAS is a straightforward process, and your storage pool should be recoverable without compromising your data. Synology's reputation as a market leader underscores the reliability of their products. Feel confident in expanding your storage pool using the DX517, and in case you need more insights into your specific setup, you can explore the Synology community forums or reach out to their support.