How to remove png grid on pictures?

Question

Adobe Photoshop

In general, I need to remove the png grid, and more specifically, make this image 1550x550 px.
I was smart enough to crop it through the "Photos" application, which is set to "Windows 10" according to the standard, but it turns out crooked there, that is, several pixels are eaten, but I would like everything to be smooth and clear. )

Answer 1

There are a lot of options:
1. On the layer, right-click: quick export to PNG or export as.
2.
ctrl+A ctrl+C
new file
ctrl+V
Save
3. Use cropping tools