Forum Discussion
Migrated files much larger in SharePoint Online than on disk
I am doing some migration testing and I am surprised how much larger files are when uploaded to SharePoint Online. I uploaded roughly 80GB of office files, which resulted in maxing out the storage li...
Small increases (e.g. 10 kB for msg files) are expected but this is extreme.
I have only seen this increase for compressed tiff files where the size sometimes increases 5 folder upon uploading (SharePoint uncompresses the tiff, inserts metadata and then applies a much less efficient compression mechanism).
I would compare the contents of the pptx before and after uploading. rename the extension to zip and then unpack the file. This should provide information what is going on.
Paul