I agree with hydra.
Shivam what is your music player for which you require NAS and cannot manage with USB drives? My point is that if you at all buy any NAS (enclosure) then buy one with useful feature sets like timed power up / power down (for scheduled downloads), built in DLNA and UPnP servers, additional USB disk sharing, USB Print Server (if you have a USB printer), DDNS, FTP servers, etc. If you buy one without some of these essential features and later on realize that those are your necessities then you will repent. So better buy a good one than a standby one.