I Application Support
~/Library/Application Support/CloudDocs/session/i is a CloudDocs working folder used by macOS while handling iCloud Drive file sync activity.
What is I Application Support?
~/Library/Application Support/CloudDocs/session/i is part of the CloudDocs data used by macOS for iCloud Drive syncing. It stores transient working data related to file transfers, sync sessions, and locally staged cloud content while your Mac communicates with iCloud. Users usually encounter this folder only when checking storage usage or troubleshooting unusually large Library data. The contents can include temporary copies of documents, media, and web-style resource files created during sync operations. This is not a normal place to store personal files manually, and changes inside it can affect pending or incomplete iCloud Drive activity until the system rebuilds or re-downloads data.
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Safety overview
Status: Use with caution
This folder is tied to Apple's iCloud Drive sync system and may contain in-progress or locally staged copies of cloud files. Removing items here can interrupt syncing, cause files to re-download, or leave recently changed documents unavailable until CloudDocs rebuilds its state. If this folder is unusually large, first confirm that iCloud Drive is fully synced and that important files are visible in Finder and on iCloud before deleting anything.
Recommendation: Keep this folder if you use iCloud Drive. If it is consuming abnormal disk space, restart the Mac, let iCloud Drive finish syncing, and verify your files from Finder before considering cleanup. Only remove contents after confirming they are duplicate or temporary data and after making sure your important files are backed up elsewhere, because active sync items may return automatically.
File path
~/Library/Application Support/CloudDocs/session/i
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