Partial Download
Temporary & DownloadsPART commonly holds incomplete download data, not a standalone finished media/document format. Missing bytes and app resume state may matter. Partial playback after renaming does not prove completeness; inspect the originating download manager.
- What it is used for
- Incomplete/interrupted download data
- What the file contains
- Partial / temporary data
All sections, questions and sources
Content reviewed： · Editor：Kai
Opening steps
Choose your environment or purpose to see its steps.
Menu labels and support vary by app, OS and version. Preserve the original before making changes.
Troubleshooting by symptom
- Cannot resume: inspect server support, authorization/expiry and app state.
- Zero-byte final-name companion: do not blindly replace target/intermediate files.
- Left behind: establish completion and active download state before cleanup.
- PART and another same-name file coexist: inspect their relationship/status before moving either.
- Repeated stop at the same point: isolate space, connectivity, expired authentication or source errors.
- Partially playable: readable beginnings do not establish complete data; verify completion/integrity.
Verify format and content after completion
- Complete the transfer using supported resume or restart.
- Identify the finished format/content and convert with a compatible application only if required.
- Complete the transfer through the producer and inspect the intended file format; renaming partial data is not conversion.
Renaming intermediate data does not recover missing bytes.
Diagnose a remaining PART
PART is used by multiple downloaders; identify the producer and resume through its own download manager.
Paused transfers, network failures, authentication expiry and destination problems need different handling; inspect application status/errors.
Source for these steps：Mozilla · Where to find and manage downloaded files in Firefox / Google · Fix file download errors
Check size, ending and content
Approximate size does not ensure integrity; compare checksums where supplied and inspect content according to its purpose.
Moving resumable data may break the producer’s references; preserve the original arrangement until completion.
Source for these steps：Mozilla · Where to find and manage downloaded files in Firefox / Google · Fix file download errors
Related-format differences
| Format | Main role | What to check |
|---|---|---|
| PART | Intermediate/state data | Producer/transfer status |
| Other partial suffixes | Other partial-storage workflows | Not necessarily interchangeable |
| PDF / MP4 / ZIP | Completed intended artifact | Verify completion/content |
Handling and security
Do not resume suspicious sources or rename to evade protection. Preserve needed data before cleanup.
Questions and answers
Is PART a video format?
The intended download can be media, documents or software.
Does removing the suffix finish it?
No; missing bytes are not added.
Can another browser resume it?
It depends on app state and server conditions.
Should I manually combine PART and another file?
The application may manage positioning/state; do not concatenate without identifying its storage method.
May I immediately delete leftover partial files?
Check active/resumable state and validate completed files before deciding retention.
Format facts: name, steward and MIME type
- Formal name
- Partial transfer data, application-dependent
- Steward / specification
- Download applications such as Firefox
- MIME type
- Depends on the producer or server; an extension alone does not establish a MIME type.
Primary and official sources
- Platform documentationWhere to find and manage downloaded files in Firefox
Explains the downloads list and pause/resume controls.
Mozilla · Link checked： - Platform documentationFix file download errors
Documents failed Chrome download handling.
Google · Link checked：