when i startup nas, the harddrive makes some noise for 5 seconds and and the led flashes a couple of times, and then then nothing happends
I'm afraid the disk itself died.
When it isn't, it is perfectly possible to recover the contents using your laptop, but not using Windows 7. The data partition is in XFS format, which is not supported by Windows. You'll have to boot from a Linux Live CD
or -USB stick. This can mount both the XFS partition, and the internal NTFS partition(s) to copy the data to.
You can connect the disk with an ESATA to SATA cable, but you'll have to power the disk. Of course you can use the NAS for that, but maybe the power supply in the NAS is the problem. You could also put the disk in an ESATA or USB enclosure, they have their own power supply.