Memorex 32020013358 25GB 4X Write-Once BD-R Blu-ray Discs (15pk Spindle)

I could give this crap 0 start if were possible; I lost my back up data in less than 2 months. This blank media is useless, it make no sense to throw your money down the toiled. I recommend ether TDK, Sony or Panasonic.

No coasters yet. Just wish these would come down in price more.
I would use them more if that were the case. I only use them for movies.
I would use them for data backup if the price were lower.

Resides the price I do not see any reason to buy this "Bad Quality" Blu-rays, if you are planed to storage files, music or photos you probably have success because the PC usually are able to read them for a while, but at the end (1 to 2 years) you will lost all your data, so I will recommend you to buy the new model by Panasonic Panasonic Blu-ray Disc 20 Pack - 25GB 6X BD-R - Printable that will last forever!

If we are talking about transfer Movies into this awful Memorex Blu-ray the bad ending will be sooner... you won't be able to see then in you Blu-ray Player after 3 to 5 months, so what it the idea to do all over again?????? For Movie the best ones out there are made by TDK, any of them will last for ever and the choice will be base on the capacity and quantity needed:

25GB:TDK Blu-ray Disc 50 Spindle - 25GB 4X BD-R - Printable
50GB:TDK Blu-ray Disc 10 Pack - 50GB 4X BD-R DL - Printable [Japanese Import]

I am a commercial photographer and produce many, many large files. My workflow currently involves writing to and managing files on a 10TB NAS array (Network Attached Storage). After finding one of my 2TB NAS units having problems for a second time I decided to start additionally archiving everything to optical media and storing in fire proof file cabinets as a precautionary backup. My Sony laptop was the first 15" Core2Duo to ship with a Blu-ray burner. In fact it's literally serial number 000001. I've been using Memorex BD-R disks bought in 15disc spindles for about a year now and am now at about 100 total disks burned. Using the following setup I have not had any problems;

I copy folders from my NAS array to a 1TB RAID/0 internal array and split up files into folders to burn to each disk; blu-ray1, blu-ray2, etc. This way I can manage the total content in each folder. In Windows I right click and select properties to insure that the total content does not exceed 23.50GB (size on disk). This way I can maximize the full capacity of each blank media without exceeding it and running into problems.

I then transfer these folders to a portable Iomega USB2.0 drive which has a 120GB 7200rpm drive. I attach that to my laptop (VAIO FZ190) and use Nero Burning Rom 7 to burn each disk. I select the verify after burning option to detect any errors. Each disk is labeled with a fine Sharpie as to the clients jobs it contains and placed in individual slim cases. These are bundled by year and stored in the center drawer of the center cabinet of 5 heavy fire proof file cabinets I have in the studio against an outside wall.

When I started digital archiving in the early '90s I used tape drives until I got burned and was unable to read a tape containing the only versions of some important files. After that I bought one of the first CD burners and soon learned that the media you choose is as important as the drive and the software you use. I then bought one of the first DVD burners when they came out. In 2008 I started building the NAS array and moving my previous CD & DVD archives to the array for easy access. I did find that some disks were not entirely readable, but had also made some duplication so the lost files were very minimal. What I learned in this process is you need to be prepared to reachive your data every few years to maintain readable formats and to insure the integrity of your archives. It never hurts to make more than one copy and in fact it's best not to do so immediately after making the first copy (or you may duplicate any problems).

Sometime in the future I will buy an additional burner; most likely an external 6X or 12X. At that point I will start testing the readability of my existing archive with this drive (sometimes readability is less consistent drive to drive) and start an additional rearchive with this new, faster burner.

With the great value of these disk ($2.33ea. as of Feb.2010) and the apparent quality I am reluctant to switch media.

For those that have been making coasters or had other problems I might suggest a more methodical process to insure consistent success.

Recorded 7 disks in the 6 months period. 3 so far lost data. I have not used them to read/check until now so they look like brand new
but data is missing.
Do not buy these unless you want to lose your data.