user583: I have a Bitcoin installation on an SD card, and the blockchain files (blk0001.dat specifically) take up nearly 4 GB of disk space.
Can the blk0001.dat and blk0002.dat files be safely deleted to free up space on my SD card? Will the blockchain just be downloaded again next time I run my bitcoin client?

user208: You can delete them just fine, as long as you delete blkindex.dat too. They will be downloaded and processed again. This will take a while, these days, though.

583: <p>I have a Bitcoin installation on an SD card, and the blockchain files (<code>blk0001.dat</code> specifically) take up nearly 4 GB of disk space.</p>

<p>Can the <code>blk0001.dat</code> and <code>blk0002.dat</code> files be safely deleted to free up space on my SD card? Will the blockchain just be downloaded again next time I run my bitcoin client?</p>
 208: <p>You can delete them just fine, as long as you delete blkindex.dat too. They will be downloaded and processed again. This will take a while, these days, though.</p>
