Portable - Draftsight

: When utilizing cloud storage for mobile DWG editing, always configure your cloud provider to "Always keep on this device" for your active project folders. Working directly off a live stream can corrupt your DWG files if your cellular or Wi-Fi connection drops out mid-save.

It is important to note that for their current versions (2020 and later). draftsight portable

The Ultimate Guide to DraftSight Portable: CAD Freedom Without Installation : When utilizing cloud storage for mobile DWG