I also tried using “diskgenius”, but I couldn’t find it in the recoverable files, but I seemed to have found the storage path of my previous vault folder. The default vault file is the obsidian vault under “documents”. Because my C drive didn’t have enough space, I installed obsidian on the D drive, and then installed the vault file in the obsidian folder, which is d:/obsidian/obsidian vault. After the update, the entire vault folder disappeared. As for retrieval, I have used countless methods to basically confirm that I don’t have any previous note files on my computer.