thank you Trevor, I adjusted memory allocation, as in the attached image. I'm providing 1 more memory card that will complete 12GB, that's what I can buy now. thanks
12GB is a much more healthy amount of RAM for Photoshop. Not great, but a lot better than 8. Until then, if you can get away with 82% thern carry on with that setting. You'll notice issues when performing a task like printing an image because the OS (Windows has to spool the image ready to print and that takes some memory. So it is working for you, stay with it, but avoid having lots of apps open.