PNG exporting with Black Background

[#1]

I've been trying to export my logos with a transparent background, but while they show up transparent on some platforms, on others, it appears with a black background. 

The logos were drawn with Procreate, so I thought it was because of that. I then exported it as a .psd file then dragged all the layers except the background into a new .psd file that has a true "Transparent Background" canvas. Images are in already in RGB. No matter if I "save as" or "export," when I import these .png files into things like Google Drive or InShot, a black background appears. Sometimes, even if it appears to be transparent digitally, it'll print out with a black background. I would have to print a PDF exported and made from Photoshop in order to use the logo even just in a corner. 

My Photoshop is up to date. It was updated at the beginning of December. If anyone has any idea what I could do, my frustration and I would greatly appreciate it!

[#2]

I've been trying to export my logos with a transparent background, but while they show up transparent on some platforms, on others, it appears with a black background. 

The logos were drawn with Procreate, so I thought it was because of that. I then exported it as a .psd file then dragged all the layers except the background into a new .psd file that has a true "Transparent Background" canvas. Images are in already in RGB. No matter if I "save as" or "export," when I import these .png files into things like Google Drive or InShot, a black background appears. Sometimes, even if it appears to be transparent digitally, it'll print out with a black background. I would have to print a PDF exported and made from Photoshop in order to use the logo even just in a corner. 

My Photoshop is up to date. It was updated at the beginning of December. If anyone has any idea what I could do, my frustration and I would greatly appreciate it!

[#3]

One thing is certain: Photoshop is not adding black color to transparent areas. Why you see them? Because certain platform or software is set to show black color instead of transparency checkerboard or whatever color is background color of page which is displaying file. 

If I can understand you are stating that printed material also has black background instead of some other color (white paper color for example). Where and how do you print your files?