Maybe ... 8-track what to 24 track what? You don't say what devices you're using. You can take a card from a DP24 and put it into a DP32. There are limitations going the other way (32->24) ... number of channels, of course, and whether any stereo channels have been configured and tracks recorded as mono in the DP32.
If you just mean can you take the SD card you already have for some other device and use it in your machine, then most likely yes (some SD cards are cheap and can't). You'd have to reformat the card in your DP24SD, and you would, of course, lose all the data on the card, so if it's important backup that card to your computer before formatting.