转移或复制现有的代码。
转移或复制数据的原因可能是为了提高性能，或者因为当前环境中没有足够的空间容纳不断增长的数据。
The reasons for moving or copying data could be for performance issues, or general growth of data where there is not enough space in its current environment.
与此同时，照片正在被复制到其它硬盘，转移过程需要一些时间。
In the meantime, though, the photos are being copied to new drives - a process that can take some time due to the large amount of data that was affected.
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