Optional write-protect tab

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Optional write-protect tab

Post  kosovohp on Thu Sep 30, 2010 11:47 am

When looking at the card from the top (see pictures) there is one required notch on the right side (the side with the diagonal notched corner).

On the left side may be a write-protection notch. If this is present, the card cannot be written. If the notch is covered by a sliding write protection tab, or absent, then the card is writeable. Because the notch is detected only by the reader, the protection can be overridden if desired (and if supported by the reader). Not all devices support write protection, which is an optional feature of the SD standard.

Some SD cards have no write-protection notch,[6] and it is absent completely in the MicroSD and MiniSD formats.

Some music and film media companies (e.g., Disney) have released limited catalogs of records and/or videos on SD. These usually contain DRM-encoded Windows Media files, making use of the SD format's DRM capabilities.[citation needed] Such media are usually permanently marked read-only by adding the notch with no tabs.

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