Because PSD files retain historical data, layer caches, and uncompressed pixel information, they are significantly larger than flattened counterparts. This can lead to storage bottlenecks and slow open/save times.
October 26, 2023 Subject: Specifications, Capabilities, and Workflow Integration of the PSD File Format format file photoshop
★★★★☆ – Perfect for final delivery, but never use as a working format. Avoid repeated saves. Because PSD files retain historical data, layer caches,