Does an SSD still need to be defragmented?

Question

Weirdo · Accepted Answer

No, not manually. When Windows "optimizes" an SSD it mainly sends TRIM, telling the drive which space is no longer in use, rather than shuffling files around like a hard-disk defrag. It runs on a schedule by default, so you can leave it alone.

Microsoft's support page puts it plainly: hard disk drives are defragmented, reorganizing files so they line up and are easier to read; solid-state drives are "trimmed," which tells the drive where it can safely do cleanup work when it is idle. Both are labeled optimization in Defragment and Optimize Drives, which is why they look like the same thing.

The Optimize-Volume documentation lists the defaults: hard disks are analyzed and defragmented, while SSDs that support TRIM get a ReTrim. The defrag command documentation adds that the scheduled task performs traditional defragmentation and retrim on SSDs once a month for file-system needs, and changing the schedule frequency does not change that monthly cadence.

Almost never. Keep the scheduled optimization in Defragment and Optimize Drives turned on and Windows handles it. What to avoid is old third-party defrag tools repeatedly running full defrags on an SSD, which adds writes for no real benefit. To check, search for defrag on the taskbar and confirm the media type column says Solid state drive.

Does an SSD still need to be defragmented?

Hard drives get defragmented, SSDs get trimmed

Windows picks the method per drive type

When you actually need to do anything