Does this have expandable storage (M.2 or otherwise)?

The product has a 500GB Hard Drive with an HDD interface of SATA. There is no mention of M.2 or other expandable storage options.

Questions & Answers: Refurbished: Dell OptiPlex 3050 Small Form Factor with Core i5-6500 3.20GHz Quad Core Processor, 4GB DDR4 Memory, 500GB Hard Drive, and Windows 10 Professional

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Dell OptiPlex 3050 Small Form Factor with Core i5-6500 3.20GHz Quad Core Processor, 4GB DDR4 Memory, 500GB Hard Drive, and Windows 10 Professional