I can't access my previous drawings.

[Anonymous]

(Please understand that there are translation and mistranslation using the translator.)   
Recently, I touched the picture to modify the picture I used to draw on this app, and a window pops up, "Sorry, I couldn't open the image." I've tried it again and again, but I got the same result. This picture is one that I haven't finished yet, so I really need to revise it. I don't know if it's an error or not, but I must correct this picture. If anyone knows how to fix this, please leave a comment. Thank you.

[david.lau]

I am so sorry that you have lost some of your work.  Please check out step 7 (versioning a file) and 9 (proper import of a file into SketchBook) noted here:

https://forums.autodesk.com/t5/sketchbook-forum/android-sketchbook-tips-and-tricks/td-p/9385407