Is there a limit for the data traffic and the size of the database for the Online version?

For this format, the size of the database is limited to 4 Gb in the basic package. If required, you can buy additional volume blocks up to maximum of 10 Gb.
For this format, the size of the data traffic is limited to 1 Gb in the basic package (this is for upload and download added together). If required, you can buy an unlimited number of additional data traffic blocks .