I have problems recording DVD+RW. How to format or erase DVD+RW/-RW properly?

The DVD+RW as oposite to DVD-RW doesn't have to be reformated every time you record a new data. When you buy blank DVD+RW it is not formatted (the data side is shiny). A recording software needs to FULLY format such blank DVD+RW at least once before the data can be recorded. Because the formatting is long process (about 20 min per DVD) the burning software usually formats only the part that is really needed to hold data. You recognize such formated part as darker in color. Next time if you write less data then the disc doesn't have to be formatted, if you try to write more data, the remaining unformatted part will have to be again formatted by the application. Once the part of DVD+RW is formatted it doesn't have to be ever formatted again to write new data over it. Of course a quick format can be then done which will simply erase the previous data but that is not necessary. This is different from DVD-RW. DVD-RW has to be erased each time you want to record new data, but it doesn't ...  more