First, click Preferences in the lower right corner of the SpiderOak application window, then select the Backup tab.
To exclude files or folders with a certain word or phrase in the filename, you will need to set a wildcard exclusion. When you are selecting a wildcard to exclude certain directories, you must make certain that you include an asterisk (*) where appropriate.
For example, to exclude all files or folders that END with the phrase 'stuff', add the wildcard exclusion
*stuff. If you type this in the "Exclude files matching wildcard" field, this tells SpiderOak to exclude all files that end with the phrase "stuff" regardless of what other text is in front of the file.
To exclude a file or folder that has "stuff" anywhere in its file name, enter the exclusion
To exclude a particular type of file, type an asterisk followed by the file type in the "Exclude files" field. For example, to exclude temporary files, you would enter the wild card exclusion
If you do not include any asterisks in your wildcard, SpiderOak will only exclude those files and directories which exactly match what you have entered.