https://www.digitec.ch/de/s1/producttype/speicherkartenlesegeraet-22?tagIds=520 On the left in the bar "Memory card type" (at the very bottom) > select "Memory Stick Pro Duo

The "Memory Stick Pro Duo (4 GB, Memory Stick Duo)" from Sony is compatible with the Sony Cyber-shot DSC-W80. This camera supports Memory Stick Pro Duo memory cards, which means that the 4 GB card should work without any problems.

No. Cameras with Memory Stick memory cards have not been made for years and neither have the cards. Maybe replace the 14-year-old Sony one. That was one of Sony's own concoctions. At some point they finally switched to SD cards.

Yes, this card works without problems with the PSP 1000.

No offence but... these memory sticks are obsolete and Sony won't be producing them much longer. Why not buy a normal SD card instead of this outdated technology? MS are hard to get and way too expensive... with an SD card you get even more GB for even less money.... my tip: Sandisk Extreme Pro SDHC UHS-I (16GB, Class 10) This camera produces images that take up very little space. Meaning, don't buy big memory cards... at most a 16Gb... that's enough for thousands of pictures... even that is too much.... imagine if the card is defective... the camera gets broken or stolen. I don't work with too big cards even with SLR... I'd rather have 1-2 cards that take up practically no space than one big one where I run the risk of losing ALL my pictures at once ;) Any photographer will tell you that.

For the PSP Go you would need the following memory card: Sony Memory Stick MICRO, incl USB adapter (2GB)