I want to get myself a new laptop, but I don't want to pay too much for it. With the devices, everything usually fits, except for the color space coverage. Now I have considered adding an external monitor which then covers a higher color space accordingly.
Can this then also develop its full "potential" or is it somehow limited because it is still related to the laptop and the graphics card or the cover limit?
Why do you need the exact color space coverage?
Most people already have sRGB and so won't see if you're uploading anything in Adobe RGB anyway. So if you post the photos online somewhere, it doesn't make much difference. It is more likely to give you problems because Windows itself does not support color profiles. This means that in the Windows Photo app, as well as in the Windows background and also in most games, the colors are displayed incorrectly and oversaturated.
Otherwise there's no limitation, Adobe RGB and sRGB use the same number of colors. The graphics card has relatively little to do with it, the decisive factor is the color profile.
I would like to use the laptop for photo editing via Photoshop. In terms of color space coverage, I'm more concerned with getting a higher sRGB range. Laptops in my target price range usually only have around 60% sRGB, although there are also some with almost 100%. With the hackts, however, the processor, RAM etc.
Did I understand correctly, if I get a screen with, for example, 100% sRGB, then it will be displayed to me when editing, regardless of which laptop is connected.
Yes. The signal is always the same - 8 bit RGB. The screen with less coverage shows the colors only a little less saturated or does not have a high brightness dynamic.