買東西要把用料差異考量進去．．．

http://www.wdc.com/ch/products/products.asp?driveid=733

　　請按規格，看加載／卸載是３０萬最少．

http://www.wdc.com/ch/products/products.asp?driveid=488

　　雖然同是黑標，但舊款就只剩５萬最少．

http://www.wdc.com/ch/products/Products.asp?DriveID=793

　　藍標新款也有３０萬最少．

http://www.wdc.com/ch/products/products.asp?DriveID=394

　　藍標舊款也只剩５萬最少．

http://www.wdc.com/ch/products/products.asp?driveid=254

　　舊舊款就乾脆不標了．

http://www.wdc.com/ch/products/products.asp?DriveID=866

　　綠標就算是最最新款３ＴＢ也不標加載／卸載，連轉速都不提．．．