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I use Peakd but I used ecency before and it was worse in it xd. Do you upload through pc or Mobile bro? I have 5g speeds so I don't know why this is happening.

Oh, I also sometimes use peakd if there's an error in the efficiency but I never check for a decrease in the quality of the artwork. And yes, I work with a laptop and then I send a picture of the sequence of making the work in JPEG format to my smartphone, while I check the color of my work is correct or whether the color is dark or off, because my computer has bad color calibration so I rely on my smartphone which has 100 SRGB and It has been color calibrated from the manufacturer.

so that after uploading on various devices there is no significant color change.

And I only use a home WiFi modem with a speed of around 30mbps and so far it's been smooth.

I post in png format. I wonder if that's what's causing the issue.

It could be, just try using JPEG format but don't compress it too much, if you use Clip Studio Paint, the JPEG format is quite good, because if I use PNG, maybe the size of my work can be more than 10 MB per image.

I will try this. Thank you 😊

you are welcome bro😁