Hello @Seller_MHTAvlsJdrInP,

Thank you for your post. Individual selling accounts have a default storage limit and are not subject to storage limit increases.

For Professional selling accounts, storage limits are updated quarterly. Storage limits are calculated using several factors including:

• Your sales volume (including your sales' seasonality periods)
• Your historical IPI scores

Available fulfillment center capacity

Sellers with consistently higher IPI scores will receive higher storage limits, adjusted for sales volume and available capacity. When setting limits for an upcoming quarter, Amazon considers both your recent sales volume and seasonal volume from the last year.

For more information, visit FBA inventory storage limits

Adam