Inaccessible backup CD's

When I took out some of my CD's to retrieve saved files, I found that some of them became inaccessible. That made me remember that CD's do have life span. Hence we should back up on new CD's from time to time so that our data are not lost.

I did use isobar which I bought to read inaccessible CD's but in vain too. If this is the case, I will make backup on usb drives too as a safer way to keep my data.

I like to write down the date on each CD with backup so that I can know how long it has been residing in the CD and I can know its age too. Some CD ROM drives can't read files written by other brands of CD ROM. Hence it is wise to keep another copy of our files in the hard disk.