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FAQ / FILE MANAGER > HOW TO HANDLE SPLIT FILES
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File split and merge



SPLIT A FILE IN SMALLER PARTS

JOIN (MERGE) SPLIT FILE VOLUMES

MORE INFORMATION ABOUT FILE SPANNING

file split tool



Splitting a file in PeaZip you can select the volume size form a series of pre-set sizes (floppy disk, typical mail attachment maximum size, CD, DVD...) or you can customize it up to byte level.

how to split a file in smaller parts

File split is recommended every time it is needed to fit data in a mandatory output size (such as maximum email attachment limit or media support size), rather than proceding with trial and error compression attempts hoping to reduce the file size under that limit, which may not be possible even with best compression and higher settings.
Each message / media will contain up to the specified amout of data, guaranteeing the package can be sent / written to disk without errors.

file spanning


PeaZip offers different, alternative ways to split/join files:
  1. Add files and folders to the archive's layout (i.e. select it and click Add button), then
    1. Click volume size dropdown menu (by default set on "Single volume, do not split") in order to split the output to multiple volumes, chosing from custom or pre-set sizes (recommended email attachment sizes, CD, DVD, etc): this method allows to combine the benefits of archiving (consolidating multile input files & folders into a single output stream), compression (reducing disk occupation eliminating data redundancy), and file spanning (keeping the output in volumes smaller than a given maximum size).
    2. Alternatively, change archive type option (below output path option) to "Split" and set volume size and optional integrity check algorithm.
  2. Open PeaZip, chose File manage > File Tools > "split file" or "join files" from main menu and provide the input file name (provide the first volume of the set, usually the file with .001 extension for merging back spanned archives).
  3. From Windoiws file explorer you can rightclick on a file and chose to split it from PeaZip's entry in SendTo or Context menu;
If you are splitting a file into multiple removable media, PeaZip will check if the media has enough free space for storing the volumes, and will be asked you to provide a new empty media each time the previous one is full.

Purely splitting a file does not involve compression, that is usually only marginally efficient on multimedia files, like ie. MP3, OGG and other audio formats, or AVI, MPEG, DIVX and other video formats.
As said before, if you prefer to combine splitting with compression, you can add the file(s) to a ZIP or 7Z archive and chose to split (cut) the archive in volumes of a fixed size, in order to keep them below the size limits of a support or mail attachment: this is preferable also when handling multiple multimedia files in order to store them in a single archive, split in fixed sized volumes, rather than having to split each file separately.
In this case you can set minimum compression or no compression ("store" level) to speed up the process avoiding to compress scarcely compressible data: hints how to improve file compression, how to reduce size of images

Join (merge) split file volumes


how to merge a spanned archive


When you receive a multipart file or archive, to join the data back to obtain the original file, move or copy all the parts of the file in the same folder before proceeding with extraction

merge split email attachments


Open the first archive's part with PeaZip, i.e. doubleclick on the first volume wich is usually identified with extension .001, .Z01, R01, .PART1 or similar - please some times set counter stars from 000, R00, Z00 instead.
Now you can extract it wit "Extract" or "Extract all" from PeaZip's toolbar or context menu, or just drag content from PeaZip to the system
Alternatively, righclick on the first volume of the spanned file and use "Extract" or "Extract here" PeaZip's entries in system's context menu

More information about file spanning


External online resources: entropy definitioninformation theory compression on Wikipedia, discussion of e-mail attachment limitmaximum email size allowed.

Topics and serach suggestions: file split, join files, split zip archive, split rar archive, file spanning software for Microsoft Windows and Linux operating systems, multi volume archives, split files freeware, spanned archives set, file splitting utility, multi volume zip and rar files, .001 extension, .z01 volumes, .R01 files, file join program, merge files, split mail attachments, reduce attachments size wiki, maximum mail attachments size, file splitter software.


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