The default backup interval of WPS is 10 minute. If you enter more than 150 minutes per minute, the interval is too long and can be shortened. (WPS Text-Options-General and Save-Restore Options in the upper left corner).
Still insecure, I want to see the backup documents on different computers. Under the "Office Space" tab, log in to your USB flash drive account, and then turn on "Automatic Backup". At this time, the document notes will turn green. Every time you save your document, a backup document will be generated, corresponding to the flash drive in the cloud.