Update data-upload.md

docs/user-documentation/general-users/data-upload.md

 Data Upload
 ====
- 
-## Data upload via web UI
 
 
+Data can be uploaded to Datasets in openBIS to Experiments and Objects (e.g., Experimental Steps). openBIS is agnostic of file formats and types.
 
- 
+Small data files can be uploaded via the web user interface, larger data files can be uploaded via dropbox mechanism.
 
-  To upload data via the web interface:
+ 
+## Data upload via web UI
 
- 
+To upload data via the web interface: 
 
 1.Click the **Upload** button in the form, as shown below.