I use SyncThing with obsidian on Android, window and linux and can confirm. Setting it up is straight forward my only issue is that it doesn’t merge files. If a file is edited on two devices that can’t be synced (one is offline while the other one edits the file for example) it turns the older edit of the file into a copy and takes the newer version for both devices. Depending on your use case it could not be an issue for you at all though.

As far as I understand Markdown is a syntax standard used for that kind of note taking or article writing

With the SATA acronym it seems to have trouble resolving the AT, so I became curious. Here’s what I’ve found:

“AT” was IBM’s abbreviation for “Advanced Technology”; thus, many companies and organizations indicate SATA is an abbreviation of “Serial Advanced Technology Attachment”. However, the ATA specifications simply use the name “AT Attachment”, to avoid possible trademark issues with IBM.