Files

WiCAN PRO has two places for files: a small internal flash for the things the firmware keeps (certificates, scripts, the vehicle tables, the dashboard layout) and the SD card for everything large (logs, firmware files). The File Manager browses both, uploads, downloads and tidies.

File Manager. Pick a storage area, then browse.

The two storage areas

	Path	Size	Holds
Internal flash	/data	about 5.75 MB	certificates, scripts, the vehicle tables, the dashboard layout, cached web libraries
SD card	/sd	the card	log files, firmware files, anything large

Folders you will meet:

Folder	What is in it
/data/autopid	the vehicle tables: config.json (what is polled now), vehicles.json and vehicles/ (every car WiCAN knows), std_scan.json (the last detection), dtc_db/ (uploaded code databases)
/data/certs	certificate sets (System › Certificates); the keys are never readable through the page
/data/scripts	Berry scripts (Scripts)
/data/cache	the web libraries the browser installed on demand (code editor, charts); safe to delete, they are fetched again when needed
/sd/logs	the Data logger's files

The settings themselves are not files here: they live on a partition of their own and travel as one document, see Backup and restore.

Browse, upload, download

• Open on a storage card lists its root; the breadcrumb and the folder rows navigate, and the address bar carries the path so a folder can be bookmarked.
• The toolbar filters and sorts; ticking rows selects several for Delete.
• Upload: drop files onto a folder listing, or use the upload button. Up to 2 MB per file; a file is written whole and swapped in at the end, so a power cut during an upload never leaves a torn file. Missing folders are created.
• Download any file with its row's button; small text files open in a preview first.
• A file that WiCAN is writing right now (the logger's active file) is marked in use and cannot be downloaded or deleted until it is released; a logger file set aside after a read error is marked .corrupt.

The SD card

Any card formatted FAT, as cards come. WiCAN mounts it when it is seated and releases it when it is pulled, also while running; the Status page's SD card row and the Logger's status chip say whether it is mounted. WiCAN never formats a card: an unreadable one stays unmounted and the log says why.

By API

The same operations are routes, for scripts on a PC: list a folder, read the capacity, download, upload, delete, make a folder. The HTTP API reference has them, with the device's own answers.

Troubleshooting

Symptom	Likely cause	What to do
/sd says backend unavailable	no card, or the card is not readable	seat the card; format it FAT on a PC
Upload refused at 2 MB	the per-file limit	split the file, or keep it on the SD card by other means (a card reader)
file in use	the logger is writing that file	Pause on the Logger page, then download
Internal flash nearly full	cached libraries, old scripts	delete /data/cache; the browser fetches a library again when a page needs it
A vehicle table disappeared after a factory flash from a PC	a flash with an erase wipes /data	restore the files from a copy; the settings come back from a backup