Uploading files and splitting multi-plate 3MF files

This guide covers getting files into SimplyPrint - by drag-and-drop or the file picker - which file types are supported, and the plate splitter that turns a multi-plate 3MF into separate files you can name, tag and print individually.

This is part of the file manager documentation.

In this guide

• Uploading files
• Supported file types
• What happens after upload
• Splitting a multi-plate 3MF
• Naming plates automatically
• Ultimaker .ufp files
• Related articles

Uploading files

There are two ways to upload:

• Drag and drop one or more files anywhere onto the Files page. A drop overlay appears to confirm SimplyPrint is ready to receive them.
• Click the upload button in the toolbar (the upload icon) to open your system file picker and select files.

Files are uploaded into whichever folder you currently have open, so open the destination folder first. You can upload several files at once - each gets its own progress bar in the uploads card, and you can retry or cancel an individual file if it fails.

Supported file types

SimplyPrint is built for 3D printing, so it accepts the file types that matter for printing rather than any file. You can upload:

What happens after upload

As soon as a printable file lands, SimplyPrint reads through it to pull out details like print time, filament usage, temperatures, the slicer used and more. You may see a purple progress bar while this runs - it usually takes a couple of seconds. The results power the print details, cost estimate and printer-compatibility checks shown in the file detail panel. To dig into exactly what is parsed, read the Gcode Analysis feature.

Every uploaded file counts against your cloud storage. See Files and cloud storage for how space is used.

Splitting a multi-plate 3MF

Slicers like Bambu Studio and OrcaSlicer can save one 3MF file containing several plates - effectively several separate prints packed into a single file. When you upload a 3MF that holds more than one plate, SimplyPrint detects them and offers to split the file into separate files, one per plate, instead of treating the whole thing as a single job.

The plate splitter shows a card for each plate with its thumbnail. From here you can:

1. Choose which plates to keep - click a plate to select or deselect it, or use Select all.
2. Name each plate - type a name in the field on each plate card so the resulting files are easy to tell apart.
3. Confirm - the selected plates are saved as individual files.

If you upload several multi-plate files at once, SimplyPrint walks you through them one at a time, showing "File 1 of 3 with multiple plates" and similar so you can split everything in one go.

Naming plates automatically

Instead of naming each plate by hand, you can set a naming pattern that fills in every plate name at once. Patterns use variables wrapped in placeholders, including:

• the original filename
• the plate number
• the plate name (if the slicer embedded one)
• the total number of plates
• any custom field values you fill in

So a pattern like the filename followed by the plate number produces consistent, predictable names across all plates. If you are an account owner, you can save your pattern as the default so it is pre-filled next time.

You can also set custom-field values right in the splitter, and they apply to every plate you save, which keeps things like an order number or project code consistent across the whole set.

Ultimaker .ufp files

Ultimaker .ufp files are packaged printables, similar in structure to a 3MF. SimplyPrint recognizes them automatically - they decode, show a 3D preview and thumbnail, and print just like any other printable file, with no extra steps from you.

Related articles

• The file manager
• The file detail panel
• Folders and shared folders
• The Gcode Analysis feature
• Files and cloud storage
• Adding items to the print queue

Updated on: 25/06/2026