Severe floods have halted production at the Thai factory which is one of the world’s largest makers of hard drives for personal computers.
Western Digital said production in Thailand, where it makes about 60% of its hard drives, would be “constrained” in the current quarter.
Thailand’s worst floods in half a century have killed more than 280 people since late July, swamped more than two-thirds of country and inflicted billions in damage.
Western Digital produced nearly 54 million hard drives in the April-June quarter, with 60% of those made at its plant near the Thai capital Bangkok. The remainder were produced in neighbouring Malaysia.
Other technology companies including Microsemi and ON Semiconductor have reported production disruptions in Thailand because of the flooding.