SKILLS & TRICKS
This is one of the most controversial topics of SharePoint Online and everyone seems to have a theory. For some it works like a charm and they never get to experience the pain while others even open up tickets with Microsoft Premium Support and still the issue remain unresolved.
Yes i am referring to the great file attachment and upload sizes. When you go online to look for the right answer, all you get is confusion with out dated information. For example old articles, new ones, One Drive for Business sync tools, classic vs modern and you will get unsure exactly what sizes to recommend to a client. So, I decided to do some testing with various large dummy file sizes around what I was reading the limitations to be. The results were close to Microsoft’s article, but with a very interesting caveat .
There are a few factors when you want to know max file sizes: