Question about data file folders in Numbers
I have created a Numbers spreadsheet ot create acataluge of my books. The file is simply called Books.numbers.
I now find on my desktop two folders - Books.numbers.sb-be4ae974-2tdLVg and Books.numbers.sb-be4ae974-A7nKNd. The former has sub folders called Data, Index and Metdata. The other has a Metadata dubfolder and several Preview.jpg files.
What are these folders, and do I need to kepp them. Doe sNumbers always create such folders?
Thanks
iMac (27-inch Mid 2011), iOS 7.0.2