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gdrive-api.php v1.3 (Server[40], 08/11/26) built a working streaming upload (drive_upload_path, Google resumable protocol, live-tested working code). But every folder tried (4 real candidates found via native Drive search -- two named snapshots, their shared parent, and an apps subfolder matching yesterdays successful-test timeframe) returned either 404 (not visible to service account) or 403 storageQuotaExceeded (visible but not a real Shared Drive from Googles perspective) -- the exact original blocker SOP-GDRIVE-SERVICE-ACCOUNT.md v1.7 claimed was fixed 08/10/26. No folder ID from that successful test was ever documented anywhere (SOP, decisions, knowledge.db). Need: confirm/create a genuine Shared Drive, share it with the service account (cai-platform-writer@cai-yttcom.iam.gserviceaccount.com) as Manager or Content Manager, and get its real ID recorded in SOP-GDRIVE-SERVICE-ACCOUNT.md so this stops being rediscovered from scratch. Todays platform snapshot (36MB, 2875 files) is safe server-side but not yet copied to Drive as a result.