Compare an old-computer backup with a new folder to find renamed exact matches, one-sided files and same-path version conflicts. The browser workflow is read-only and upload-free.
Imagine 2,400 files in the old backup and 1,900 on the new PC. A blind copy cannot show what already exists, what was renamed or whether a familiar path now contains a newer version.
IMG_2048.JPG on the old side and Kyoto Station.jpg on the new side match completely. You can avoid copying it again, but still review why each location exists.
A contract attachment or photograph found only in the backup is a migration candidate after you confirm it is not obsolete or damaged.
New work on the current PC should not be overwritten by the old backup or copied backwards unless you are updating that backup.
Both sides contain Documents/plan.docx, but the content differs. Keep or rename both versions until a person resolves the conflict.
Pause sync and automatic backup so the old source and new folder stop changing. If the old drive may be failing, make a verified recovery copy first instead of adding a full-content scan to its workload.
Do not compare an entire Windows profile. Start with Photos, Documents or another clear collection, and exclude AppData, installed applications, package environments and operating-system locations.
Different names with identical bytes suggest the new PC already has that content. The same path with different bytes means both sides changed and should not be resolved from the newest timestamp alone; copies, extraction and restoration can reset file times.
DUPESPACE separates renamed or moved matches, same-path exact matches, same-path conflicts, incoming-only files and destination-only files. It is a map for review, not an automatic copy plan.
Review old-side-only files first and decide where required items belong. Resolve version conflicts next. Only then use exact matches to avoid copying content that is already present.
The website never moves files. Export the CSV and use a file manager you trust for small batches. Open several documents and photographs after every batch.
After migration, recount important folders, compare their sizes, open multiple file formats and test restoring the new backup. Keep the old source for a reasonable verification period before archiving or erasing it.
DUPESPACE can confirm matching bytes. It cannot prove that application data migrated, cloud sync completed or a backup is recoverable. Validate those with the relevant software and backup process.
No. It runs in the current browser tab and only reads folders you choose. It does not upload, copy, overwrite or delete files.
No. Copying, downloading and restoring can change timestamps. Review the actual content and purpose of same-path conflicts.
It is safer to compare bounded photo, document and other user-data folders separately. System, application and project data need their own migration methods.
No. The browser produces a read-only comparison so the tool cannot overwrite or remove files whose version purpose it does not understand.
Browser tools are read-only. The Windows app revalidates reviewed candidates before moving them to the Recycle Bin.
