file fragmentation
Computing term for the scattering of file data across non-contiguous disk sectors, leading to slower access times.
As file fragmentation progresses, read speed decreases.
Please run defragmentation regularly to resolve file fragmentation.
断片化 is the general term for fragmentation; ファイルの断片化 specifically refers to file fragmentation in computing.
Compound of ファイル (file) + の (possessive particle) + 断片化 (fragmentation). 断片化 is from 断片 (fragment) + 化 (-ization).