That is impossible on a CD-R. Once written to, files on the CD-R cannot be modified. You should be able to modify them on a CD-RW, but this requires support from the operating system for CD-RW drives.
If you are buring data on a CD-R it's by default read only. Thus, use a CD-R (not CD-RW) and use just the standard windows recording tools (drug and drop, or send to).
no
what CD that allows you to read and write
No, not to my knowledge. A CD-R can only be recorded and read. It can't be erased, reformatted, or re-recorded. In order to have the files no longer "readable", the CD would have to be destroyed. I have heard, however, that age or storage conditions can make a CD unreadable. I believe the files are still there, but the CD is damaged in some way.
CD-R means you can only write/record files to a CD/DVD one time. CD-RW means you can write/record files to a CD/DVD and then re-write new files or delete old files from the said CD-RW. CD-RW hold less than CD-R's and they tend to get buggy the more times you add/edit/delete/re-write over them. Also if you are lets say burning music to a CD to play in your car or something some CD-RW's are not really compatible with standard car stereos.
You can store files on CD-RW and also CD-R. Flash drives are a little better though.
You can indeed burn a CD that already has files on it. You would just have to write over the other files on the CD.
YES!
CD+r means write once, read many. This means that you can only write data to the CD once, after that it will be on there forever and you can always get to it.
In general, no. CD-ROM is read-only. You can only read from it after a manufacturer writes to the disc permanently. However, there are recordable CDs (CD-R), which allow you to write once. And, there are rewritable (CD-RW), which allow you to write and erase many times. The same goes for existing DVD technology (DVD, DVD-R, DVD-RW).
This was mainly used to distinguish between different kinds of CDs, the (factory manufactored) read-only CDs, the recordable (write once) CDs and the re-writeable CDs.'Read-Write CD Rom' usually refers to the last kind. Formally it's a misnomer, since ROM (read only memory) would exclude writing, but since CD-ROM was initially the most common kind, many people referred to CDs as CD-ROMs and then added distinguishing modifiers like 'read-write' without realizing the specific meaning of the ROM acronym.(The same applies to read-write CD-ROM drives, named that way to distinguish them from read-only CD drives.)
Yes