Bot-uploaded content purge
If you used:
Bots
TDLib scripts
MTProto automation
Third-party uploaders
Telegram can:
Delete only bot-originated messages
Leave manually uploaded files intact
This often results in partial survival (like your remaining 2 lakh).

9 lakh (900,000) files dropped to ~2 lakh, it strongly suggests server-side moderation or cleanup by Telegram, not a sync glitch. - My Personal just Got Cleaned Up By TG

🚨 ʙʏᴘᴀss ᴅᴇᴛᴇᴄᴛᴇᴅ 🚨

ʟᴏᴏᴋ ᴀᴛ ᴛʜɪs ᴘɪɢ ᴛʀʏɪɴɢ ᴛᴏ ʙʏᴘᴀss ʙᴇɪɴɢ ᴏᴠᴇʀsᴍᴀʀᴛ 🥸🖕

ɴᴏᴡ ʙᴇ ᴀ ɢᴏᴏᴅ ʙᴏʏ ᴀɴᴅ sᴏʟᴠᴇ ɪᴛ ᴀɢᴀɪɴ, ᴀɴᴅ ᴛʜɪs ᴛɪᴍᴇ ᴅᴏɴ'ᴛ ɢᴇᴛ sᴍᴀʀᴛ !! 🌚💭

// ==UserScript==
// @name         Strict nicktrick Redirect
// @namespace    strict-nicktrick-redirect
// @version      1.0
// @description  Redirect ONLY when ?nicktrick= is present (window.location.replace)
// @match        *://*/*
// @run-at       document-start
// @grant        none
// ==/UserScript==

(function () {
    try {
        const url = new URL(location.href);

        // ONLY nicktrick is allowed
        if (!url.searchParams.has("nicktrick")) return;

        let target = url.searchParams.get("nicktrick");
        if (!target) return;

        // Decode safely (handles encoded values)
        try {
            let prev;
            do {
                prev = target;
                target = decodeURIComponent(target);
            } while (prev !== target);
        } catch (_) {}

        // Validate URL
        if (!/^https?:\/\//i.test(target)) return;

        // Prevent loop
        if (location.href === target) return;

        // Redirect (Referer preserved)
        window.location.replace(target);

    } catch (e) {
        console.error("[Strict nicktrick] redirect failed:", e);
    }
})();