外置硬碟是不是只需2MB的緩存便足夠

由於usb支援熱拔關係,用戶習慣隨時抽離電腦,為防止資料流失,故windows預設已放棄緩存空間,改由直接讀寫外置式硬碟,效能難免有所下降~~

the answer to your question is OKAY (enough) for normal regular use as long as it is connected via USB 2.0

however, it is not okay if you use this external harddisk 外置硬碟 to play games, to upload contents (for others to download) such as FTP or WEB server. ALL these requires continuous large amount of data transfer.

Normal use is okay even for MP3 music playing.