Hi chasethecat,
Welcome to this forum. I have also recently purchased a PRS-350 as my first e-reader as well. I hope that your problems have already been resolved. If not, I would suggest the following:
1) Did you use drag-&-drop to copy books to your 350 or through software? I use drag-&-drop on my 350 and I simply put all files in "media\books". I previously put the books in folders and subfolders in "media\books" on the 350 which caused page-turning really sluggish. Once I remove all the subfolders on the 350 then it just loaded and turned pages smoothly. Not sure if it is related to your problem.
2) Could the problem be your e-book files as suggested by other members here? I would suggest you to go to the "E-Books" forum here (
https://www.mobileread.com/forums/ebo...&sort=dateline) and just download a few e-books there and try it on your e-reader.
If your problem persists, let us know what files you have downloaded and I can try them on my PRS-350.
If those e-books work on your 350, then the problem would more likely be your own files and not the e-reader then.
Hope it helps and enjoy your reading!