The good thing is that there is no one right way to do this. AutoCAD WS has a number of methods to enable you to upload your drawings into your online account.
Your Android or iOS Phone / Tablet
Android and iOS users: Any drawing that you receive as an attachment to your email client in an iOS or Android phone or tablet can be uploaded into your AutoCAD WS account. You can also open drawings that were stored in your Dropbox or Box.net folder when you access them through the appropriate mobile app.
Android users: when you browse your file management app, simply tap on any DWG files saved on your SD card to open it in AutoCAD WS and upload it to your account.
iOS users: Even if your email client appears unable to open the attachment, you should be able to tap “Open with…” and select AutoCAD WS to upload the drawing to your online account and view it.
Point the browser in your PC or Mac to www.autocadws.com and register or login to your online account.
Once the app is running in your browser you can upload files from any of the main areas, Messages, Drawings and Editor, by clicking the appropriate button and browsing for the files you want to upload.
Turning to the AutoCAD desktop product. Both AutoCAD 2012 and AutoCAD LT 2012 (together with AutoCAD for Mac) were released with a new Online tab in the main ribbon.
When you open a drawing you can click the Upload button to copy the file into your online account. It can then be viewed, edited and share from any computer or mobile device running AutoCAD WS.
Furthermore, we have published a plugin for the past two versions of AutoCAD and AutoCAD LT which you can download from here: http://autocadws.com/downloads
Once you have downloaded and installed the plugin, you will find an additional Online tab which will enable you to upload files directly to your AutoCAD WS account.