diff --git a/Cargo.lock b/Cargo.lock
index d588b14..e7d1951 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -32,12 +32,12 @@ checksum = "7825f6833612eb2414095684fcf6c635becf3ce97fe48cf6421321e93bfbd53c"
 
 [[package]]
 name = "atty"
-version = "0.2.14"
+version = "0.2.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
+checksum = "9a7d5b8723950951411ee34d271d99dddcc2035a16ab25310ea2c8cfd4369652"
 dependencies = [
- "hermit-abi",
  "libc",
+ "termion",
  "winapi 0.3.8",
 ]
 
@@ -217,7 +217,7 @@ dependencies = [
  "autocfg 0.1.7",
  "cfg-if",
  "crossbeam-utils 0.7.0",
- "lazy_static",
+ "lazy_static 1.4.0",
  "memoffset",
  "scopeguard",
 ]
@@ -238,7 +238,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "04973fa96e96579258a5091af6003abde64af786b860f18622b82e026cca60e6"
 dependencies = [
  "cfg-if",
- "lazy_static",
+ "lazy_static 1.4.0",
 ]
 
 [[package]]
@@ -249,7 +249,7 @@ checksum = "ce446db02cdc3165b94ae73111e570793400d0794e46125cc4056c81cbb039f4"
 dependencies = [
  "autocfg 0.1.7",
  "cfg-if",
- "lazy_static",
+ "lazy_static 1.4.0",
 ]
 
 [[package]]
@@ -598,6 +598,12 @@ dependencies = [
  "winapi-build",
 ]
 
+[[package]]
+name = "lazy_static"
+version = "0.2.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "76f033c7ad61445c5b347c7382dd1237847eb1bce590fe50365dcb33d546be73"
+
 [[package]]
 name = "lazy_static"
 version = "1.4.0"
@@ -781,6 +787,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "numtoa"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8f8bdf33df195859076e54ab11ee78a1b208382d3a26ec40d142ffc1ecc49ef"
+
 [[package]]
 name = "parking_lot"
 version = "0.9.0"
@@ -825,7 +837,10 @@ version = "0.1.0"
 dependencies = [
  "google-photoslibrary1",
  "google_api_auth",
+ "log 0.4.8",
  "regex",
+ "serde_json",
+ "stderrlog",
  "structopt",
  "yup-oauth2",
 ]
@@ -873,7 +888,7 @@ checksum = "3bbaa49075179162b49acac1c6aa45fb4dafb5f13cf6794276d77bc7fd95757b"
 dependencies = [
  "error-chain",
  "idna 0.2.0",
- "lazy_static",
+ "lazy_static 1.4.0",
  "regex",
  "url 2.1.1",
 ]
@@ -1008,6 +1023,15 @@ version = "0.1.56"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2439c63f3f6139d1b57529d16bc3b8bb855230c8efcc5d3a896c8bea7c3b1e84"
 
+[[package]]
+name = "redox_termios"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7e891cfe48e9100a70a3b6eb652fef28920c117d366339687bd5576160db0f76"
+dependencies = [
+ "redox_syscall",
+]
+
 [[package]]
 name = "regex"
 version = "1.3.4"
@@ -1017,7 +1041,7 @@ dependencies = [
  "aho-corasick",
  "memchr",
  "regex-syntax",
- "thread_local",
+ "thread_local 1.0.1",
 ]
 
 [[package]]
@@ -1069,7 +1093,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "113f53b644c5442e20ff3a299be3d6c61ba143737af5bd2ab298e248a7575b2d"
 dependencies = [
  "cc",
- "lazy_static",
+ "lazy_static 1.4.0",
  "libc",
  "spin",
  "untrusted",
@@ -1240,6 +1264,19 @@ version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"
 
+[[package]]
+name = "stderrlog"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32e5ee9b90a5452c570a0b0ac1c99ae9498db7e56e33d74366de7f2a7add7f25"
+dependencies = [
+ "atty",
+ "chrono",
+ "log 0.4.8",
+ "termcolor",
+ "thread_local 0.3.4",
+]
+
 [[package]]
 name = "string"
 version = "0.2.1"
@@ -1262,7 +1299,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a1bcbed7d48956fcbb5d80c6b95aedb553513de0a1b451ea92679d999c010e98"
 dependencies = [
  "clap",
- "lazy_static",
+ "lazy_static 1.4.0",
  "structopt-derive",
 ]
 
@@ -1313,6 +1350,27 @@ dependencies = [
  "unicode-xid",
 ]
 
+[[package]]
+name = "termcolor"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb6bfa289a4d7c5766392812c0a1f4c1ba45afa1ad47803c11e1f407d846d75f"
+dependencies = [
+ "winapi-util",
+]
+
+[[package]]
+name = "termion"
+version = "1.5.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c22cec9d8978d906be5ac94bceb5a010d885c626c4c8855721a4dbd20e3ac905"
+dependencies = [
+ "libc",
+ "numtoa",
+ "redox_syscall",
+ "redox_termios",
+]
+
 [[package]]
 name = "textnonce"
 version = "0.6.5"
@@ -1336,13 +1394,23 @@ dependencies = [
  "unicode-width",
 ]
 
+[[package]]
+name = "thread_local"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1697c4b57aeeb7a536b647165a2825faddffb1d3bad386d507709bd51a90bb14"
+dependencies = [
+ "lazy_static 0.2.11",
+ "unreachable",
+]
+
 [[package]]
 name = "thread_local"
 version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d40c6d1b69745a6ec6fb1ca717914848da4b44ae29d9b3080cbee91d72a69b14"
 dependencies = [
- "lazy_static",
+ "lazy_static 1.4.0",
 ]
 
 [[package]]
@@ -1452,7 +1520,7 @@ checksum = "6732fe6b53c8d11178dcb77ac6d9682af27fc6d4cb87789449152e5377377146"
 dependencies = [
  "crossbeam-utils 0.6.6",
  "futures",
- "lazy_static",
+ "lazy_static 1.4.0",
  "log 0.4.8",
  "mio",
  "num_cpus",
@@ -1511,7 +1579,7 @@ dependencies = [
  "crossbeam-queue",
  "crossbeam-utils 0.6.6",
  "futures",
- "lazy_static",
+ "lazy_static 1.4.0",
  "log 0.4.8",
  "num_cpus",
  "slab",
@@ -1623,6 +1691,15 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
 
+[[package]]
+name = "unreachable"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "382810877fe448991dfc7f0dd6e3ae5d58088fd0ea5e35189655f84e6814fa56"
+dependencies = [
+ "void",
+]
+
 [[package]]
 name = "untrusted"
 version = "0.7.0"
@@ -1678,6 +1755,12 @@ version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "078775d0255232fb988e6fccf26ddc9d1ac274299aaedcedce21c6f72cc533ce"
 
+[[package]]
+name = "void"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
+
 [[package]]
 name = "want"
 version = "0.2.0"
@@ -1706,7 +1789,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "11cdb95816290b525b32587d76419facd99662a07e59d3cdb560488a819d9a45"
 dependencies = [
  "bumpalo",
- "lazy_static",
+ "lazy_static 1.4.0",
  "log 0.4.8",
  "proc-macro2",
  "quote",
@@ -1828,6 +1911,15 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 
+[[package]]
+name = "winapi-util"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ccfbf554c6ad11084fb7517daca16cfdcaccbdadba4fc336f032a8b12c2ad80"
+dependencies = [
+ "winapi 0.3.8",
+]
+
 [[package]]
 name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
diff --git a/Cargo.toml b/Cargo.toml
index f4c29a4..5958848 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,3 +13,6 @@ google_api_auth = { git = "https://github.com/google-apis-rs/generator", feature
 google-photoslibrary1  = { path = "../google-api-photoslibrary" }
 structopt = "0.3.9"
 regex = "1.3.4"
+log = "0.4.8"
+stderrlog = "0.4.3"
+serde_json = "1.0.46"
diff --git a/src/main.rs b/src/main.rs
index a1a9b7a..282169b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,9 +1,13 @@
 use std::error::Error;
+use std::fs;
 use std::path::PathBuf;
 
 use google_api_auth;
 use google_photoslibrary1;
+use google_photoslibrary1::schemas::Album;
 use google_photoslibrary1::schemas::SearchMediaItemsRequest;
+use log::debug;
+use log::info;
 use regex::Regex;
 use structopt::StructOpt;
 use yup_oauth2::{Authenticator, InstalledFlow};
@@ -17,6 +21,13 @@ enum Command {
     SearchMediaItems {
         album_id: String,
     },
+    Sync {
+        /// Optional album title to filter.  Default will mirror all albums.
+        #[structopt(short, long)]
+        title_filter: Option<Regex>,
+        /// Directory to store sync.
+        output: PathBuf,
+    },
 }
 
 #[derive(Debug, StructOpt)]
@@ -27,7 +38,7 @@ enum Command {
 struct Opt {
     /// Activate debug mode
     #[structopt(short, parse(from_occurrences))]
-    verbose: u32,
+    verbose: usize,
 
     /// Path to json file containing Google client ID and secrets for out of band auth flow.
     #[structopt(long)]
@@ -58,7 +69,7 @@ fn new_client(
     .build()
     .unwrap();
 
-    let scopes = vec!["https://www.googleapis.com/auth/photoslibrary.readonly".to_string()];
+    let scopes = vec![google_photoslibrary1::scopes::PHOTOSLIBRARY_READONLY];
 
     let auth = google_api_auth::yup_oauth2::from_authenticator(auth, scopes);
 
@@ -101,26 +112,30 @@ fn search_media_items(
     }
 }
 
-fn list_albums(
+fn sync_albums(
     client: google_photoslibrary1::Client,
     title_filter: Option<Regex>,
+    output_dir: PathBuf,
 ) -> Result<(), Box<dyn Error>> {
-    for album in client
-        .shared_albums()
-        .list()
-        .iter_shared_albums_with_all_fields()
-    {
-        let a = album?;
-        match (&title_filter, &a.title) {
-            // Print everything when no filter or title.
-            (None, None) => {}
-            // skip when filter given but the media item doesn't have a title (it can't match)
-            (_, None) => continue,
-            // skip when the media item doesn't match the filter
-            (Some(title_filter), Some(title)) if !title_filter.is_match(&title) => continue,
-            // handle everything else
-            _ => {}
+    let albums = list_albums(client, title_filter)?;
+    for a in &albums {
+        let album_dir = output_dir.join(a.id.as_ref().expect("missing album id"));
+        if !album_dir.exists() {
+            info!("making album directory {}", album_dir.to_string_lossy());
+            fs::create_dir_all(album_dir)?;
         }
+    }
+    // Serialize it to a JSON string.
+    let j = serde_json::to_string(&albums)?;
+
+    let path = output_dir.join("albums.json");
+    info!("saving {}", path.to_string_lossy());
+    fs::write(path, j)?;
+    Ok(())
+}
+
+fn print_albums(albums: Vec<Album>) {
+    for a in albums {
         println!(
             "album: {} {} ({} items)",
             a.id.unwrap_or("NO ID".to_string()),
@@ -128,15 +143,50 @@ fn list_albums(
             a.media_items_count.unwrap_or(0)
         );
     }
-    Ok(())
+}
+
+fn list_albums(
+    client: google_photoslibrary1::Client,
+    title_filter: Option<Regex>,
+) -> Result<Vec<Album>, Box<dyn Error>> {
+    Ok(client
+        .shared_albums()
+        .list()
+        .iter_shared_albums_with_all_fields()
+        .filter_map(|a| a.ok())
+        .filter(|a| {
+            match (&title_filter, &a.title) {
+                // keep everything when no filter or title.
+                (None, None) => true,
+                // skip when filter given but the media item doesn't have a title (it can't match)
+                (_, None) => false,
+                // skip when the media item doesn't match the filter
+                (Some(title_filter), Some(title)) if !title_filter.is_match(&title) => false,
+                // keep everything else
+                _ => true,
+            }
+        })
+        .collect())
 }
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     let opt = Opt::from_args();
-    println!("opt: {:?}", opt);
+    stderrlog::new()
+        .module(module_path!())
+        .verbosity(opt.verbose)
+        .init()
+        .unwrap();
+    debug!("opt: {:?}", opt);
     let client = new_client(&opt.credentials, &opt.token_cache)?;
     match opt.cmd {
-        Command::ListAlbums { title_filter } => list_albums(client, title_filter),
+        Command::ListAlbums { title_filter } => {
+            print_albums(list_albums(client, title_filter)?);
+            Ok(())
+        }
         Command::SearchMediaItems { album_id } => search_media_items(client, album_id),
+        Command::Sync {
+            title_filter,
+            output,
+        } => sync_albums(client, title_filter, output),
     }
 }