The 90MB file is just a setup wizard. Once opened, it attempts to download the remaining gigabytes of data from an external server.
Adobe Photoshop CC 2019 is a professional image editing software.The official installer size is roughly 1.5 GB to 2 GB.Compressing a 2 GB software down to 90 MB is mathematically impossible.Data compression algorithms cannot shrink complex software binaries by 95% while keeping them functional. The Hidden Dangers of "Highly Compressed" Files adobe photoshop cc 2019 highly compressed download 90mb top
You cannot update the software or access Adobe support. The 90MB file is just a setup wizard