How many photos held by miro HD 4GB with a 16MP camera?

The number of photos that can be stored on a 4GB memory card with a 16MP camera varies based on factors like image compression and file format. Generally, a 16MP image can range from about 4MB to 8MB in size. Thus, a 4GB card could typically hold approximately 500 to 1,000 photos, depending on the specific settings and compression used.