Canon POWERSHOT 1000 HS User Manual page 19

What if [Memory card locked] appears on the screen?
SD, SDHC and SDXC memory cards, and Eye-Fi cards have a write-protect tab.
If this tab is in the locked position, [Memory card locked] will appear on the screen
and you will not be able to take or erase images.
Approximate Number of Shots per Memory Card
Memory Card
Number of Shots
• Values are based on the default settings.
• The number of shots that can be taken will vary depending on camera settings, the
subject and the memory card used.
Can you check the number of shots that can be taken?
You can check the number of shots that can be taken when the camera is in a
Shooting mode (p. 25).
4 GB
1471
Number of shots that can be taken
Inserting the Memory Card
16 GB
6026
19