On the web version, you would be able to upload more than one products from a CSV file Format. CSV is a commas separated file. You may edit it with a spreadsheet program, therefore, you should not use commas when updating one. To upload a CSV file: File > CSV & Images > Data > Products > click Sample file to download a template.
Menu > File > CSV & Images
Products > Click Sample File - keep in mind the tips on how to update a csv file format
Files > CSV & Images > DATA > Products > Select (upload)
Files > CSV & Images > DATA > Products > Select > Chose File > Upload
To edit a CSV file (delimited by comass) follow these steps
Remark: if you have a products database already and you need to upload more items, you should use the Sample File to upload the new ones. Therefore, SelBuk will be able to assign the Ids in a better way.