I only confirmed the connection, and I haven't used it for an extended period. All accessories are shown in the images. I believe there are no noticeable scratches or stains. Please check the images. Below is a summary of the specifications by AI. [Product Name] Ratoc Systems USB 3.0/2.0 RAID Case (for 2 HDDs) Model Number: RS-EC32-U3RWS [Product URL] https://www.ratocsystems.com/products/subpage/rsec32u3r.html [Overview] A USB 3.0/2.0 connected RAID case that can accommodate two 3.5-inch SATA HDDs. It supports multiple modes: RAID0, RAID1, SP (spanning), and NORMAL (single), allowing you to build an external storage environment for high-speed transfer and data protection. [Supported Drives] ・3.5-inch SATA HDD x 2 [Connection Interface] ・USB 3.0 (SuperSpeed 5Gbps) ・USB 2.0 (High-Speed 480Mbps) [Supported OS] ・Windows (Windows 11/10/8.1/7, etc.) ・macOS (Mac OS X 10.6 and later, etc.) [RAID Modes] ・RAID0 (striping): High-speed data transfer and combined capacity ・RAID1 (mirroring): Data backup protection ・SP (spanning): Use HDDs of different capacities in combination ・NORMAL (single): Each HDD is recognized as an independent drive [RAID Functions/Management] ・RAID1 automatic rebuild support (automatic recovery even when power is off) ・Hot-swap support (RAID1 replacement) ・Status notification via LED/buzzer ・RAID/HDD management software support (download separately) [File System Support Examples] ・exFAT ・NTFS ・FAT32 ・HFS+ [Physical Specifications] ・External Dimensions: Approximately Width 81 x Height 123 x Depth 177 mm ・Weight: Approximately 760 g (body only) ・Power: DC 12V (AC adapter included)