While Labfolder allows all file types to be uploaded, the following can be annotated directly within an entry:

When exporting annotated files (1), you will have the option to download the original file (2) or the annotated one (3).

Note: After uploading word and excel spreadsheets they need to be extracted first (1), so that they can be annotated directly by clicking the pencil icon (2). In order to preserve the original data, the imported word documents and excel spreadsheets will remain in the entry (3) unless you remove them from the entry. Thereby, you can always view and download the modified data as well as the original one.