How to clear dev_w0, dev_w1 files.

Hello All,

my F:\usr\sap\<SID>DVEBMGS00\work contails lots of file like dev_w0, dev_w1. this type of file have around 40GB. This directory have around 90 gb now. Due to this reason my HDD is going full.

What is this file containing and how i an reduce the size of these file.

Please help me.

Regards

Kariyath