Losing CD capacity

[djprescott]

When I back-up onto CD using the XP CD writing wizard, I then look at the capacity of the CD and it has gone down to 250mb ish form 700. Why is this?

Dave

[Kerplunk]

Because you have put 450mb of data onto the CD and have closed the disk so it cannot be written on again presumably

[djprescott]

No, I am copying something like 35mb onto the cd at each backup and it will fill the CD when it reaches 250mb or so.

If I look at the capacity of the CD before I use it, it shows 720mb, but after the first copy of data, it goes down to 250mb. If I do this at home using Nero I don't get the problem so it must be XP.

[Kerplunk]

Yeah it must be.