How to reduce photos on an iphone 4s?

Recently went on a family trip and i took so many pictures.1000. And now my picture storage took up 10gb i need to figure out how to take those pictures and put them on a card or something and get them off my phone because i now have to delete apps and photos to have storage and i don't want to do that

You can plug your phone into your PC or Mac computer with your USB cord and transfer
them to your computer. I actually don't know how to put them on an SD card but I know it can be done easily. Just get them on your computer first then look up how to put them on your SD card. You may be able to put the card in your computer directly and do it if you have a slot for that. I don't have one but I'm sure they have ones that do.