Segmentation by Types classifies cases according to material construction, protective features and card capacity. Hard‑shell aluminum enclosures, valued for impact resistance, dominate the premium tier and capture roughly 30 % of market volume, especially among professional users. Soft‑flexible silicone sleeves, offering cost efficiency and basic protection, hold about 25 % of sales, appealing to hobbyists. Waterproof sealed modules, engineered for moisture‑prone environments, command 20 % of the market, serving surveillance and outdoor research sectors. RFID‑blocking carriers, designed to prevent unauthorized data access, occupy 15 % of the segment, reflecting growing security concerns. Multi‑card organizer systems, which integrate slots for diverse formats (SD, micro‑SD, CF), represent the remaining 10 %, addressing mixed‑format workflows. The relative share of each type mirrors functional priorities across applications, thereby shaping the aggregate market size and influencing supply chain strategies.