What is the maximum data size limit for a personal geodatabase?

The maximum data size limit for a personal geodatabase in ArcGIS is 2GB. This limit is an inherent characteristic of the underlying Microsoft Access database format on which personal geodatabases are built. Each personal geodatabase can hold various datasets, including feature classes, tables, and raster datasets, but when the total storage for these datasets reaches 2GB, no additional data can be added. This size limitation makes personal geodatabases suitable for smaller projects or individual use cases but less ideal for larger, enterprise-level applications where substantial data storage is required. In contrast, a file geodatabase has far larger capacity limits, making it more appropriate for extensive datasets and more complex analyses.