Group 1 - The storage sector continues to strengthen, with Western Digital (WDC.US) rising over 8%, SanDisk (SNDK.US) increasing over 5%, and Seagate Technology (STX.US) gaining over 4%, all reaching new historical highs [1] - Western Digital announced a $4 billion stock buyback plan due to a surge in demand for its memory chips driven by artificial intelligence servers [1] - UBS analysts predict that a "meaningful supply relief" in the global storage industry will not occur until around 2028, with structural demand from AI data center construction continuing to enhance the memory industry's prosperity and pricing power [1] Group 2 - In the short term, UBS recommends focusing on the two nearly monopolistic HDD manufacturers, Seagate and Western Digital [1] - Analysts view these two companies as a "short-term trading theme" for the storage industry's cyclical prosperity, benefiting from high industry concentration, controlled supply, and a phase of demand recovery leading to price and profit elasticity [1]