we made a game and want to try it on our pocketchip but we're not sure where to place the .png.p8

~/.lexaloffle/pico-8/carts

You have to go to the address bar in the file browser, and type a "." after the file browser address, it'll show you the .lexaloffle (hidden) folder then. Once you're in that, it's smooth sailing. Bookmark the "carts" directory.

On the Pocket Chip you can also press CTRL+H to show hidden files in the file manager.

I placed it in the folder but when i launch pico8 and press on my game it says "Could not load" its a .p8.png file like the rest of them

try to upload the file here, it's hard to say what's the problem without the file

fixed. i think the problem was i uploaded it to teknik and it change the file name and then i manually renamed it back. this time i put the png into a usb then connect the usb to my pocketchip and placed the file in the same location and it worked

[ this was a reply to a question deleted since! ]

dddaaannn gave the path to the carts directory. with this path, you can use a terminal to go there (with the cd command), or a graphical file manager (where you’ll have to show hidden files, then click on .lexaloffle, pico-8, carts.

an easier way was added since 2017: run FOLDER in the pico-8 command prompt! you can also change the directory that’s used by editing the config file.

https://www.lexaloffle.com/dl/docs/pico-8_manual.html#_File_System
https://www.lexaloffle.com/dl/docs/pico-8_manual.html#_Configuration