We don’t disagree that there is a market for a cross-platform handwritten note taking app! We would love for Squid to be available on all platforms. We’re a small team and we don’t currently have the resources to expand to Windows (or iOS). We hope this will change someday!
We currently support creating and restoring backups to/from Google Drive via the local backup settings: http://feedback.squidnotes.com/knowledgebase/articles/1185616
I understand that this does not meet everyone’s needs. Adding support for Google Drive to the automatic backup options is something we continue to investigate.
I recently wrote an open letter to Cloud Storage providers on this subject: https://medium.com/steadfast-innovation/open-letter-to-cloud-storage-apps-on-android-a2d0eb919fc4
Please encourage your favorite cloud storage provider (i.e. Google Drive) to fully support the Android Storage Access Framework (as stated in the above letter). This will not only help us to better support backup and restore to ANY cloud app, but will help the ecosystem as a whole.